MASTERBUILT MPS 250S XL Propane Smoker Owner’s Manual

July 11, 2024
Masterbuilt

MASTERBUILT MPS 250S XL Propane Smoker

Product Specifications

  • Model: MASTERBUILT 20050614
  • Manual Code: 9805170029 171201-GSB
  • Models: MPS 250S, MB20050614, MB20051118, MB21051314

Product Usage Instructions

Before using the smoker, it is crucial to follow these safety precautions:

  • Ensure proper ventilation by using the appliance outdoors only.
  • If you smell gas, shut off the gas supply and contact the fire department.
  • Do not burn wood chips indoors to prevent carbon monoxide hazards.
  • Keep the smoker at least 10 feet away from any structure or combustible material.
  • Cure the smoker to eliminate any residual chemicals or oils from the manufacturing process.
  • Follow the pre-seasoning instructions provided in the manual before cooking any food.
  • Use protective gloves or cooking tools to handle hot surfaces.
  • Avoid touching hot surfaces directly to prevent burns.
  • Follow all instructions for loading/unloading food, adding wood chips, and water.

FAQ

  • Q: Can I use the smoker indoors?
  • A: No, the smoker should only be used outdoors in a well-ventilated area to prevent carbon monoxide hazards.
  • Q: How far should the smoker be placed from structures?
  • A: It is recommended to keep the smoker at least 10 feet away from any structure or combustible material for safety reasons.
  • Q: How do I prepare the smoker for first-time use?
  • A: Follow the pre-seasoning instructions provided in the manual to rid the unit of residual chemicals and oils before cooking.

Welcome to the family. Let’s get started.

MPS 250S

  • XL PROPANE SMOKER
  • FUMOIR AU PROPANE XL
  • AHUMADOR A PROPANO XL

The manual applies to the following model number(s)

  • MB20050614, MB20051118, MB21051314
  • Your model number
  • Mfg. Date – Serial Number

These numbers are located on the rating label of the uni

IMPORTANT

  • Please record this information immediately and keep in a safe place for future use.

CARBON MONOXIDE HAZAR

  • Burning wood chips gives off carbon monoxide, which has no odor and can cause death.
  • DO NOT burn wood chips inside homes, vehicles, tents, garages or any enclosed areas.
  • USE ONLY OUTDOORS where it is well-ventilated.

DANGER
IF YOU SMELL GAS:

  1. Shut off the gas to the appliance.
  2. Extinguish any open flame.
  3. Open/remove door.
  4. If the odor continues, keep away from the appliance and immediately call your fire department.

WARNING

  • This manual contains important information necessary for the proper assembly and safe use of the appliance.
  • Read and follow all warnings and instructions before assembling and using the appliance.
  • Follow all warnings and instructions when using the appliance.
  • Keep this manual for future reference.

Failure to follow these instructions could result in fire, explosion or burn hazard which could cause property damage, personal injury, or death.

DANGER

  1. Never leave this appliance unattended.
  2. Never operate this appliance within 10 feet (3.0m) of any structure, combustible material or other gas cylinder.
  3. Never operate this appliance within 25 feet (7.5m) of any flammable liquid.
  4. If fire should occur, keep away from the appliance and immediately call your fire department.
    Do not attempt to extinguish an oil/grease fire with water.

WARNING

CALIFORNIA PROPOSITION 65

  1. Combustion by-products produced when using this product contain chemicals known to the State of California to cause cancer, birth defects, and other reproductive harm.
  2. This product contains chemicals known to the State of California to cause cancer, birth defects or other reproductive harm.

STRUCTURAL PROXIMITY AND SAFETY USAGE RECOMMEN

Before using the smoker check the wind direction and place the cylinder DOWNWIND 12” in the upright position.
This is necessary so that the cylinder supply system is arranged for vapor withdrawal and prevents the cylinder from striking the unit if tipped.

WARNING: HOSE IS A TRIP HAZARD THAT COULD CAUSE SUPPLY CYLINDER TO TIP

MASTERBUILT-MPS-250S-XL-Propane-Smoker-FIG-1

GENERAL WARNINGS AND SAFETY INFORMATION

READ ALL INSTRUCTIONS

  • Always use units by all applicable local, state, and federal fire codes.
  • Before each use check all nuts, screws, and bolts to make sure they are tight and secure.
  • Never operate units under overhead construction such as roof coverings, carports, awnings, or overhangs.
  • Unit is for HOUSEHOLD OUTDOOR USE ONLY.
  • Never use inside enclosed areas such as patios, garages, buildings or tents.
  • Never use inside or on recreational vehicles or boats.
  • Maintain a minimum distance of 10ft (3m) from overhead construction, walls, rails or other structures.
  • Keep a minimum 10ft (3m) clearance of all combustible materials such as wood, dry plants, grass, brush, paper, or canvas.
  • Never use the unit for anything other than its intended use. This unit is NOT for commercial use.
  • Accessory attachments not supplied by Masterbuilt Manufacturing, LLC are NOT recommended and may cause injury.
  • Use of alcohol, prescription or non-prescription drugs may impair the user’s ability to properly assemble or safely operate the unit.
  • Keep a fire extinguisher accessible at all times while operating the unit.
  • When cooking with oil or grease, have a type BC or ABC fire extinguisher readily available.
  • In the event of an oil or grease fire do not attempt to extinguish with water. Immediately call the fire department. A Type BC or ABC fire extinguisher may, in some circumstances contain the fire.
  • Use unit on a level, non-combustible, stable surface such as dirt, concrete, brick or rock. An asphalt surface (blacktop) may not be acceptable for this purpose.
  • Unit MUST be on the ground. Do not place units on tables or counters. Do NOT move the unit across uneven surfaces.
  • Do not use the unit on wooden or flammable surfaces.
  • Keep the unit clear and free from combustible materials such as gasoline and other flammable vapors and liquids.
  • Do not leave the unit unattended.
  • Keep children and pets away from the unit at all times. Do NOT allow children to use the unit. Close supervision is necessary should children or pets be in area where unit is being used.
  • Do NOT allow anyone to conduct activities around unit during or following its use until it has cooled.
  • Never use glass, plastic or ceramic cookware in unit. Never place empty cookware in the unit while in use.
  • Never move the unit when in use. Allow the unit to cool completely (below 115°F (45°C)) before moving or storing.
  • Store only when fire is completely out and all surfaces are cold.
  • Never use the unit as a heater (READ CARBON MONOXIDE HAZARD).
  • The unit is HOT while in use and will remain HOT for some time afterward and during the cooling process. Use CAUTION. Wear protective gloves/mitts.
  • Be careful when removing food from the unit. All surfaces are HOT and may cause burns. Use protective gloves/mitts or long, sturdy cooking tools for protection from hot surfaces or splatter from cooking liquids.
  • DO NOT bump or impact the unit to prevent personal harm, damage to the unit or spillage/splashing of hot cooking liquid.
  • Do not touch HOT surfaces.
  • Unit is hot during use. To avoid burns, keep your face and body away from the door, lid and vents. Steam and hot air are expelled during use.
  • Air dampers are HOT while the unit is in use and during cooling; wear protective gloves when adjusting.
  • The unit has an open flame. Keep hands, hair, and face away from the burner flame. Do NOT lean over the burner when lighting. Loose hair and clothing may catch fire.
  • DO NOT obstruct the flow of combustion and ventilation.
  • Do not cover cooking racks with metal foil. This will trap heat and may cause damage to the unit.
  • Installation of the unit must conform with local codes or in the absence of local codes, with National Fuel Gas Code, ANSIZ223.1/NFPA 54, Storage and Handling of Liquefied Petroleum Gasses, ANSI/NFPA 58 or CSA B149.1, Natural Gas Installation Code; Propane Storage and Handling, CSA B149.2; or the Standard for Recreational Vehicles, ANSI A119.2/NFPA 1192; and Recreational Vehicle Code, CSA Z240 RV Series as applicable.
  • Before each use inspect the gas hose for signs of damage.

WARNINGS & IMPORTANT SAFEGUARDS CONTINUED

  • Keep the fuel supply hose away from any heated surface.
  • Keep the fuel supply hose away from unit while in operation.
  • Regulator and hose assembly supplied with unit MUST be used. For replacement parts, if needed, contact Masterbuilt Customer Service at 1-800-489-1581.
  • Use a 20LB (9kgs) gas cylinder that has a protective collar (cylinder not included with unit).
  • Keep ventilation openings of cylinder enclosure free and clear of debris.
  • LP gas cylinder being used must be constructed and marked by specifications for LP gas cylinders of the US Department of Transportation (DOT) or the Standard for Cylinders, Spheres and Tubes for the Transportation for Dangerous Goods, CAN/CSA-B339.
  • Never use gas cylinder if there is evidence of dents, gouges, bulges, fire damage, erosion, leakage, excessive rust, or other forms of visible external damage. This may be hazardous and the cylinder should be taken to a liquid propane supplier to be checked.
  • Never attach/disconnect gas cylinder, or move or alter gas fittings when unit is in operation.
  • Always disconnect gas cylinder from unit when not in use.
  • Unit is designed to work with propane gas only. Only use gas cylinders marked propane with this unit.
  • This product will NOT operate with natural gas.
  • When use is complete, always, first turn the burner control valve OFF, then turn the gas cylinder valve OFF, and finally disconnect the cylinder.
  • Gas MUST be turned off at the supply cylinder when not in use.
  • Cylinders MUST be stored outdoors, out of children’s reach and must NOT be stored in a building, garage, or any other enclosed area.
  • Do NOT store spare LP gas cylinder under or near unit. Gas cylinder safety relief valve may overheat allowing gas to release causing fire which may cause death or serious injury.
  • Never fill the cylinder over 80% full or the cylinder may release gas causing fire which may cause death or serious injury.
  • Place a dust cap on the cylinder valve outlet whenever the cylinder is not in use. Only install dust cap provided with the cylinder. Other caps or plugs may cause leaks.
  • If you smell, hear or see gas escaping, immediately get away from gas cylinder and call the fire department. Fire may cause death or serious injury.
  • Reference ignition steps before use.
  • Never use lighter fluid with propane.
  • Wood chips must be used in order to produce smoke and create the smoke flavor.
  • The flame disk bowl/ wood chip tray/bowl is HOT when unit is in use. Use caution when adding wood.
  • Check grease tray often during cooking. Empty grease tray before it gets full. Grease tray may need to be emptied periodically during cooking.
  • Do not open upper smoker door(s) unless necessary. Opening the smoker door(s) causes heat to escape, which may cause extended cooking time and may cause wood to flare up. Closing the door(s) will re-stabilize the temperature and stop flare up.
  • This is a smoker. There will be a lot of smoke produced when using wood chips. Smoke will escape through seams and turn the inside of smoker black. This is normal. To minimize smoke loss around door(s), door latch(s) can be adjusted to further tighten the door seal against the body.
  • To adjust the door latch, loosen the hex nut on door latch. Turn hook clockwise to tighten as shown. Secure hex nut firmly against door latch. (see diagram)
  • When outside temperature is cooler than 65°F (18°C) and/or altitude is above 3,500 feet (1067m), additional cooking time may be required. To ensure that meat is completely cooked use a meat thermometer to test internal temperature.
  • Do not use wood pellets.
  • Food needs to be in the center of the smoking racks. This allows food drippings to go into the water bowl.
  • Do not leave old wood or ashes in the flame disk bowl/woodchip tray/bowl. Once ashes are cold, empty bowl/tray. Bowl/tray should be cleaned out prior to, and after each use to prevent ash and residue buildup.
  • Dispose of cold ashes by placing them in aluminum foil, soaking them with water and discarding in a non-combustible container.
  • Do not store unit with HOT ashes inside the unit.

SMOKER OPERATION – READ & FOLLOW ALL INSTRUCTIONS CAREFULLY

GETTING STARTED

  • Pre-season unit prior to first use. See PRE-SEASON INSTRUCTIONS.
  • Before starting the unit, see ADDING WOOD CHIPS OR CHUNKS.
  • CAUTION – All surfaces are HOT and may cause burns. Use protective gloves or long, sturdy cooking tools when loading/unloading food or racks, and when adding wood chips or water.

PRE-SEASON INSTRUCTIONS

Curing your smoker will rid the unit of chemicals and oils left over by the manufacturing process allowing them to burn off.
PRE-SEASON SMOKER PRIOR TO FIRST USE

  1. Perform soapy water test, see SOAPY WATER TEST WARNINGS AND PROCEDURES.
  2. Using a napkin or cloth, rub a light coat of cooking oil on smoking racks and inside smoker door. Make sure water pan is in place with NO WATER.
  3. Fill wood chip tray with up to 1 cup (0.24l) of wood chips or chunks and light smoker. Close door.
  4. Start smoker and let the smoker burn for about 1 hour. Make sure temperature gets up to 350°F (177°C).
  5. Allow unit to cool COMPLETELY.
  6. Reapply light coat of cooking oil on smoking racks and inside of smoker door.
  7. Restart smoker and burn for 20 minutes.
    Cure your smoker periodically to prevent excessive rust.

ADDING WOOD CHIPS OR CHUNKS

  1. You may use dry or pre-soaked wood chips or chunks in your smoker. Dry chips or chunks will burn faster and produce more intense smoke. Chips or chunks pre-soaked in water (for approximately 30 minutes) will burn slower and produce a less intense smoke.
  2. DO NOT ADD MORE THAN 1 CUP (0.24l) OF WOOD CHIPS OR CHUNKS AT A TIME. Never use wood pellets.
  3. Place additional wood chips or chunks in smoker as needed to achieve desired smoke flavor.
    Wood chips or chunks must be used in order to produce smoke and create the smoke flavor.

OPERATING INSTRUCTIONS

  1. To start smoker see IGNITION INSTRUCTIONS.
  2. With protective gloves on, place water bowl in position. Pour 1 inch of water, juice, or vinegar into water bowl. This will add flavor and moisture to food and prevent it from drying out.
  3. DO NOT cover racks with aluminum foil as this will not allow heat to circulate properly.
  4. Pre-heat smoker for 30 to 45 minutes at max temperature before loading food.
  5. Place food in the smoker, position on the center of the smoking rack.
  6. DO NOT overload smoker with food. Extra large amounts of food may trap heat, extend cooking time and cause uneven cooking. Leave space between food on racks and smoker sides to ensure proper heat circulation. If utilizing cooking pans, be sure pans do not cover more than 75% of the rack space and place pans on center of rack to ensure even cooking.
  7. For best results, rotate racks between the top and bottom positions during cooking.
  8. Adjust smoker settings, control knob and air dampers, to desired cooking temperature.
    • Close all air dampers on unit to retain moisture and heat. If cooking foods such as fish or jerky, open air dampers to release moisture.
  9. If wood chips or chunks do not smoke on low setting, increase temperature to 275°. After 8 to 10 minutes or when wood chips or chunks begin to smolder, reduce temperature to desired low setting.
  10. Use caution when cooking on windy days to ensure the flame does not blow out. If you suspect or experience a flame blow out, first open the door to check the flame and follow the IGNITION INSTRUCTIONS to re-ignite the burner if needed. Adjust the burner control valve setting for a higher flame to prevent further blow outs. Never ignite smoker with the door closed.
  11. Extreme cold temperatures may extend cooking times.
  12. Once cooking is complete turn unit OFF, see IGNITION INSTRUCTIONS for turning off unit, remove the gas cylinder and then follow CLEANING and STORING INSTRUCTIONS. CLEAN AFTER EVERY USE. This will extend the life of your smoker and prevent mold and mildew.

CLEANING and STORING INSTRUCTIONS

  • ALWAYS MAKE SURE UNIT IS COOL TO THE TOUCH BEFORE CLEANING AND STORING.
  • Be sure to clean smoker after each use. Make sure the gas cylinder has been turned off and removed.
  • For rack supports, racks, water bowl, and drip pan use a mild dish detergent. Rinse and dry thoroughly.
  • For woodchip tray clean frequently to remove ash build up, residue and dust.
  • Dispose of cold ashes by placing them in aluminum foil, soaking with water and discarding in a non-combustible container.
  • For the interior, exterior and door seal of the unit simply wipe down with a damp cloth after each use to keep unit in proper working condition. Do not use a cleaning agent. Make sure to dry thoroughly.
  • After cleaning, store smoker in a covered and DRY AREA.
  • Store only when fire is completely out and all surfaces are cold.
  • When not in frequent use and using a cover, remember to check your smoker periodically to avoid possible rust and corrosion due to moisture buildup.

CHECK OUT MASTERBUILT.COM FOR MORE TIPS AND RECIPE VIDEOS.

WARNING

PERFORM “SOAPY WATER TEST” BEFORE EACH USE. SEE “SOAPY WATER TEST” SECTION IN MANUAL. EXTINGUISH ALL OPEN FLAMES BEFORE CONNECTING REGULATOR TO GAS CYLINDER. TURN GAS OFF AFTER EACH USE.

SOAPY WATER TEST WARNINGS & PROCEDURES

WARNINGS

  • Soapy water test MUST be performed each time gas cylinder is connected to burner/hose or each time it is used.
  • Soapy water test MUST be performed outdoors in well ventilated area.
  • When performing soapy water test keep unit away from open flames, sparks or lit cigarettes.
  • Never use an open flame to test for gas leaks.

PREPARATION

  • Remove any cookware and accessories from unit.
  • Make sure gas cylinder valve and burner control knob are turned to the OFF position.
  • Prepare soapy water solution: (1) part dish washing liquid (or more if desired), (3) parts water.
  • Apply soapy water solution to gas cylinder valve, regulator and hose length up to burner control valve.

MASTERBUILT-MPS-250S-XL-Propane-Smoker-FIG-2

TESTING GAS CYLINDER VALVE

  • Turn gas cylinder valve ON and watch for bubbles. DO NOT LEAVE GAS ON MORE THAN 12 SECONDS. If bubbles appear, stop, turn gas cylinder valve OFF and retighten fitting. Repeat test.

TESTING REGULATOR AND HOSE

  • AFTER gas cylinder valve has passed soapy water test, turn gas cylinder valve ON and check for bubbles at regulator location, along full length of hose and at burner control knob. DO NOT LEAVE GAS ON MORE THAN 12 SECONDS. If bubbles appear, stop, turn gas cylinder valve OFF and retighten the connection that is leaking gas. If hose is source of leak, STOP, do not use unit. Hose must be replaced.
  • WHEN TEST IS COMPLETE, AND THERE ARE NO LEAKS, WAIT MINIMUM OF 5 MINUTES FOR GAS FUMES TO DIMINISH BEFORE LIGHTING SMOKER.

DURING ANY PORTION OF SOAPY WATER TEST IF BUBBLES CONTINUE TO APPEAR, STOP, DO NOT USE UNIT. CONTACT LOCAL PROPANE DEALER OR MASTERBUILT CUSTOMER SERVICE AT 1-800-489-1581.
Note: Use 20LB (9kgs) gas cylinder that has a protective collar with this unit. Cylinder NOT included with this unit.

IGNITION INSTRUCTIONS

REGULATOR, BURNER AND GAS VALVE CONNECTION & OPERATION

  • Inspect hose before each use. If there are signs of abrasion, wear, cuts, or leaks, the hose must be replaced. DO NOT USE.

  • Inspect burner before each use. Check burner and burner venturi tube for insects and insect nests. A clogged tube can lead to a fire beneath unit.

  • Check to ensure the orifice is centered inside the venturi tube. Failure to properly assemble the valve orifice to the venture tube can result in gas leak or potential fire at connection. See assembly steps for proper assembly method.

  • Check to ensure the igniter pin is properly spaced and aligned to the burner. Igniter pin should be approximately 1/4” from the burner and aligned to the top of a burner port (Fig. 2). Confirm spacing is correct by pressing the igniter button and ensuring spark occurs between igniter pin and burner.

  • Connect hose regulator to LP Gas Cylinder (Fig. 1)

    • Make sure gas cylinder valve is closed. Turn valve clockwise until it stops.
    • Make sure burner control valve on smoker is in the OFF position.
    • Remove protective cap from gas cylinder and coupling nut if applicable.
    • Center and insert regulator nipple into valve outlet on gas cylinder as shown in figure on the left. Turn regulator coupling nut clockwise until it stops. DO NOT OVER TIGHTEN.
  • Perform soapy water test.

  • Before starting lighting procedure make sure the smoker door(s) are open.

  • When lighting burner remove all parts inside or on unit to prevent explosion from gas build up.

  • To use, turn gas cylinder valve ON, push burner control valve in and turn counter-clockwise 1/4 turn to HIGH setting. Push ignitor button to light.

  • If ignition does not take place within five seconds, turn burner control valve to OFF position and wait five minutes and repeat lighting procedures. If ignition still does not occur, see match light instructions.

  • Always ensure that smoker door(s) are open before igniting. Gas can accumulate in smoker.

  • If flame goes out during cooking, turn burner control valve OFF, turn gas cylinder valve OFF, wait 5 minutes, then open door(s) and wait 5 additional minutes before repeating ignition instructions above.

  • Burner control valve adjusts burner flame. Turn valve counterclockwise to decrease flame. Turn valve clockwise SLOWLY to increase flame. Push burner control valve in and turn clockwise to shut flame off.
    Visually check burner flame (Fig. 3). A CORRECT FLAME should be blue with a small amount of yellow at the tip. An INCORRECT FLAME is excessively yellow and irregular. If an incorrect flame occurs, turn burner control valve to OFF position, turn OFF gas cylinder valve. Allow unit to cool then loosen shutter screw and adjust air shutter (Fig. 4). If an incorrect flame still occurs allow unit to cool and then clean burner. Let burner completely dry before re- lighting.

  • After use turn burner control valve OFF, then turn gas cylinder valve OFF and disconnect tank.

  • Type 1 Regulators will have a hook (Fig. 5). The Regulator Hook is used to keep the regulator off the ground when removed from the LP cylinder. Attach to unit as shown in image.

MASTERBUILT-MPS-250S-XL-Propane-Smoker-FIG-3 MASTERBUILT-MPS-250S-XL-Propane-Smoker-FIG-4

MATCH LIGHT INSTRUCTIONS

  1. Read all instructions and warnings before lighting.
  2. Check gas control valve and gas cylinder valve to be certain it is in OFF position before connecting to gas cylinder.
  3. Perform soapy water test before each use.
  4. Open door(s) during lighting and/or remove all accessories and cooking vessels from in/or on unit.
  5. Turn gas cylinder valve on, then turn gas control valve on.
  6. Place a long, lit fireplace match stick close enough to burner to ignite.
  7. If ignition does not take place within five seconds, turn gas control valve to OFF position and wait five minutes and repeat match light instructions.
  8. After each use, first turn gas control valve off, then gas cylinder valve off. Always allow unit to cool completely before touching, moving or storing.

WARNING In the event of a gas leak that cannot be stopped, or if a fire occurs due to a gas leak, contact the fire department.

Emergency|  | Cause| Possible Solution
Gas leaking from cracked, cut, or burned hose| Damaged hose| Turn off the gas at the LP cylinder.
Replace hose.
Contact Masterbuilt at 1.800.489.1581.
Gas leaking from LP cylinder| Failure due to rust or mishandled equipment| Replace the LP cylinder.
Gas leaking from the gas cylinder valve| Failure of valve due to rust, mechanical failure, or mishandled equipment| Turn off the gas cylinder valve and return the cylinder to the gas provider/supplier.
Gas leaking between LP cylinder and regulator connection| Improper installation, connection not tight enough, damaged threads, or bad rubber seal| Turn off the gas cylinder valve, then re-attach the regulator to the cylinder.
Turn off the gas cylinder valve and return the cylinder to the gas provider/supplier.
Visually inspect the rubber seal for damage.
Fire under control panel| Fire in a tube of burner due to burner blockage| Turn off both burner control knobs and gas cylinder valve. Once the fire is out and the burner has cooled, remove and inspect the burner for spiders, nests, rust, or other debris.
Grease fire or excessive/ continuous flame| Grease build-up on or around the burner area| Turn off both burner control knobs and gas cylinder valve. Allow flames to extinguish and time for the unit to cool down. Clean grease/food particles from/around the burner or burner area and surrounding surfaces.

Symptom

|  | TROUBLESHOOTING GUIDE

Cause

|

Possible Solution

Low flame output| Out of fuel| Refill or replace with a full LP cylinder.
Flames blow out
| Low on LP gas| Refill LP cylinder.
Flare-up| Excessive grease buildup| Clean burners and inside unit.
Excessive fat on meat| Trim fat off of meat.
The cooking temperature is too high| Adjust or lower the temperature accordingly.
Persistent grease fire| Grease trapped by food buildup around the burner system| Turn burner control knobs and gas cylinder valve off. Allow the fire to extinguish and the unit to cool down. Once cool, remove and clean parts.
Flashback (fire in burner tube)| The burner and/or burner tube has blockage| Turn burner control knobs and gas cylinder valve off. Clean burner and/or burner tube.
Slower than expected cooking times*| The valve is not properly aligned with the burner| Check to see if the valve is centered in the burner tube.

Also, see Troubleshooting solutions: “Causes” Low or No Flow/Vapor Lock/Excess flow below.

TROUBLESHOOTING SOLUTIONS: “CAUSES” LOW OR NO FLOW/VAPOR LOCK/EXCESS FLOW

Symptom                                   Cause Possible Solution


The burner doesn’t light after pressing the ignitor button| Low/no gas flow| 1. Turn burner control knobs to “OFF” position.

2. Turn the gas cylinder valve knob to OFF.

3. Disconnect the regulator from the cylinder to relieve the vapor lock.

4. Reconnect the regulator to the cylinder by hand-turning until tight.

5. Slightly open the gas cylinder valve slowly and then open further by turning 1 full turn.

6. You are now ready to light the smoker.

7. Turn the burner control knobs to high and light with the ignitor.

Vapor lock at coupling nut to LP cylinder
Low flame output| Excess flow valve tripped
Vapor lock at coupling nut/ LP cylinder connection
Flames blow out| Excess flow valve tripped
Slower than expected cooking times| Vapor lock

PARTS LIST

  • Actual product may differ from picture shown

MASTERBUILT-MPS-250S-XL-Propane-Smoker-FIG-6

HARDWARE LIST

MASTERBUILT-MPS-250S-XL-Propane-Smoker-FIG-7

PARTS LIST

NO QTY DESCRIPTION
1A 14 Smoking Rack Support (MB21051314)
1B 10 Smoking Rack Support (MB20050614/MB20051118)
2 1 Large Smoker Door w/window
3 1 Body Handle (rear)
4A 6 Smoking Rack (MB21051314)
4B 4 Smoking Rack (MB20050614/MB20051118)
5 1 Large Door Handle
6 1 Small Door Handle
7 1 Small Smoker Door
8 1 Smoker Body
9 1 Water Bowl Holder
10 1 Water Bowl
11 2 Air Damper (round)
12 1 Temperature Gauge
13 1 Propane Tank Retention Bracket
14 1 Wood Chip Tray w/Lid
15 2 Grease Tray
16 2 Grease Tray Support
17 1 Control Panel
18 1 Burner Box Kit
19 1 Ignitor
20 1 Heat Diffuser
21 1 Wood Chip Rack
22 1 Left Front Leg Kit
23 1 Right Front Leg Kit
24 1 Rear Leg Brace
25 2 Side Leg Brace
26 1 Left Rear Leg
27 1 Right Rear Leg
28 2 Control Knob
29 1 Wood Chip Handle
30 3 Door Latch
31 1 Match Stick w/Chain
32 1 Regulator/Valve/Hose Kit
33 2 Wood Chip Tray Brackets
34 1 Heat Shield
35 1 Air Damper (square)

STOP!

  • DO NOT RETURN TO RETAILER For Assembly Assistance, Missing or Damaged Parts
  • Call: MASTERBUILT Customer Service at 1-800-489-1581.
  • Please have the Model Number and Serial Number available when calling.
  • These numbers are located on the silver label on the back of the unit.
  • BEFORE ASSEMBLY READ ALL INSTRUCTIONS CAREFULLY.
  • ASSEMBLE UNIT ON A CLEAN, FLAT SURFACE.
  • TOOLS NEEDED: Adjustable wrench, Phillips head screwdriver
  • APPROXIMATE ASSEMBLY TIME: 25 minutes
  • Some assembly steps may have been completed in the factory. **

ASSEMBLY

  • Actual product may differ from picture shown

MASTERBUILT-MPS-250S-XL-Propane-Smoker-FIG-8MASTERBUILT-MPS-250S-XL-Propane-Smoker-FIG-9

  • Align ventures over valve orifices and attach ignition wires to the piezo ignitor on the control panel.

MASTERBUILT-MPS-250S-XL-Propane-Smoker-FIG-10MASTERBUILT-MPS-250S-XL-Propane-Smoker-FIG-11

  • Chip tray placement per burner(s) used.

MASTERBUILT-MPS-250S-XL-Propane-Smoker-FIG-12MASTERBUILT-MPS-250S-XL-Propane-Smoker-FIG-13

Ready. Set. Craft your Masterpiece

Pulled Pork Sliders

  • 1 pork butt (8 lb)
  • 4 tbsp of your favorite dry rub
  • 6 to 7 heaping tablespoons of yellow mustard
  • 16 slider rolls, split and toasted
  • 2 cups ketchup
  • ¼ cup apple cider vinegar
  • 2 tbsp fresh lemon juice
  • 1 tsp garlic powder
  • 1 tsp onion powder
  • 1 tsp garlic pepper
  1. In a heavy saucepan over low heat, combine ketchup, cider vinegar, lemon juice, garlic powder, onion powder, and garlic pepper and stir well. Simmer, stirring occasionally, for 10 to 15 minutes.
  2. Season pork butt generously with dry rub seasoning. Place pork in a resealable plastic bag.
  3. Spread mustard evenly over the butt while inside the bag to avoid mess. Seal the bag and refrigerate overnight.
  4. Preheat the smoker to 225°F.
  5. Place butt on middle rack of smoker and smoke for 7 to 8 hours or until internal temperature reaches 185°F.
  6. Remove from smoker. Cover with heavy-duty aluminum foil and return to smoker.
  7. Increase smoker temperature to 275°F. Smoke for an additional 2 hours or until internal temperature reaches 200°F.
  8. Let meat rest inside foil for 30 minutes. Then pull pork, add to slider buns, top with BBQ sauce, serve and enjoy!

See more recipes at recipes.masterbuilt.com.

WARRANTY

MASTERBUILT 1-YEAR LIMITED WARRANTY

Masterbuilt warrants its products to be free from defects in material and workmanship under proper assembly, normal use and recommended care for 1-year from the date of original retail purchase. The Masterbuilt warranty does not cover paint finish as it may burn off during normal use. The Masterbuilt warranty does not cover rust of the unit. Masterbuilt requires proof of purchase for warranty claims and suggests that you keep your receipt. Upon the expiration of such warranty, all such liability shall terminate.
Within the stated warranty period, Masterbuilt, at its discretion, shall replace defective components free of charge, with the owner being responsible for shipping. Should Masterbuilt require return of component(s) in question for inspection, Masterbuilt will be responsible for shipping charges to return requested item. This warranty excludes property damage sustained due to misuse, abuse, accident, damage arising out of transportation, or damage incurred by commercial use of this product.
This expressed warranty is the sole warranty given by Masterbuilt and is in lieu of all other warranties, expressed or implied including merchantability, or fitness for a particular purpose. Neither Masterbuilt nor the retail establishment selling this product has authority to make any warranties or to promise remedies in addition to or inconsistent with those stated above. Masterbuilt’s maximum liability, in any event, shall not exceed the purchase price of the product paid by the original consumer/ purchaser. Some states do not allow the exclusion or limitation of incidental or consequential damages. In such a case, the above limitations or exclusions may not be applicable.
California residents only: Not withstanding this limitation of warranty, the following specific restrictions apply; if service, repair, or replacement of the product is not commercially practical, the retailer selling the product or Masterbuilt will refund the purchase price paid for the product, less the amount directly attributable to use by the original buyer prior to the discovery of the nonconformity. Owner may take the product to the retail establishment selling this product in order to obtain performance under warranty. This expressed warranty gives you specific legal rights, and you may also have other rights which vary from state to state.

MASTERBUILT-MPS-250S-XL-Propane-Smoker-FIG-14

www.masterbuilt.com.

CONTACT

References

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