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Masterbuilt 40" ThermoTemp XL Propane Smoker

19 reviews

Estimated Arrival: Between and to all contiguous states. Subject to availability.

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Masterbuilt's standard of excellence is to design and build the most innovative products in the industry and markets we serve. Masterbuilt will strive to create a work environment that is conducive to building long-term employees who are motivated and dedicated to manufacturing quality merchandise at a fair market value. The customer is our greatest asset and our commitment is to always provide friendly, caring service. Through satisfied and loyal customers, we will earn the right to generate long-term relationships.



The 40-inch Thermotemp XL smoker makes propane smoking simple and safe. No more monitoring or adjusting the temperature.  Patented ThermoTemp innovation lets you set the temperature and walk away.  The safety shut-off valve provides a safe smoking experience while the four smoking racks provide plenty of room to smoke up to 16 chickens, 6 turkeys, 8 racks of ribs, or 8 pork butts.  Master the art of smoking with Masterbuilt.



    • Temperature sensor controls burner to maintain the desired temperature
    • A safety valve shuts off the burner if the flame is extinguished
    • Tank fuel level gauge indicates the amount of propane in the tank
    • Up to 57 hours of cook time (based on 430,000 BTUs when full, 7,500 BTUs/hour)
    • Four chrome-coated smoking racks
    • Heat diffuser evenly distributes heat from the burner
    • Large door latch to open and close doors with one hand
    • 15,750 BTU stainless steel burner
    • Handle and wheels make moving smoker easy
    • Propane tank retention bracket provides stability for propane tank
    • Stainless steel wood chip tray mounted on lower door for easy access
    • Side-mounted grease tray for easy access and quick cleanup
    • Type 1 regulator with hose


    ThermoTemp XL Propane Smoker

    MPS 340|G ThermoTemp XL Propane Smoker 
    Thermostatically-controlled propane smoking
    Old school technique. New school technology.

    Thermostat Temperature Control

    Dial it into perfection

    Patented thermostat-controlled temperature - no need to manually adjust as with traditional propane smokers and no electricity required

    Fuel Level

    Eliminate the guesswork

    The fuel level gauge indicates the amount of propane remaining in the tank

    Four Racks

    Feed a couple or crowd 

    Four chrome-coated smoking racks



       6 Turkeys |   8 Pork Butts |
       8 Racks of Ribs |  16 Chickens 


        Model MB20051316
        Width 28.74"/72cm
        Height 52.953"/134cm
        Length 22.4"/67cm
        Fuel Type Charcoal
        Warranty 1 year limited





        Up your smoke game

        40" Thermotemp Propane and Pellet Smoker Cover

        Protect your Masterbuilt Propane Smoker or Masterbuilt Pellet Smoker with this weather-resistant cover. Two cinch cords with locking toggles secure the cover while protecting the smoker and propane tank or pellet hopper from dust, debris, and harsh elements. Master the art of smoking with Masterbuilt.





        Customer Reviews
        4.8 Based on 19 Reviews
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        Filter Reviews:
          Second smoker

          Well the smoker so much I had to get a second one to be able to cook twice as much as with the first one I love it love it love it love it

          Grill Collection  Review
          The Best Smoker

          We have had our Smoker for 4 years. We have used it almost weekly. Have replaced the flame bowl, water tray several times. We now are replacing the entire unit. It has rusted ou around the burner and we don’t feel it is safe now. We have looked at other units but have decided to go back with the 230. Can’t say how much we have enjoyed the one we have. It cooks with perfection. We normally cook a Boston Butt, couple of whole Chickens and usually Fresh Sausage. Never had a fail. Never had anything burn or dry out. I’m a don’t like change person but feel comfortable with this. My neighbors all know Sunday is smoke day.

          Grill Collection  Review
          MR F.
          Great Taste

          I bought my smoker last year and I hasn't and never will used a charcoal grill again. I put my meat on and walk away. Meat is so tender and crispy . The smoke taste after complete is delicious. I recommend to all.

          Grill Collection  Review
          Best purchase I’ve made in awhile

          Smoker works excellent and keeps the temperature right where you set it. Smoked fresh bacon from my pig and it turned out perfect. Smoked ribs and Boston butts and a ham and the results were perfect every time.

          Grill Collection  Review
          K S.
          Great purchase!

          Bought this 6 or 7 weeks ago and have used every week. The only things would like changed is to make so the knob doesn't move on the spindle that holds it. We placed a oven thermometer hanging from one of the racks that we can see through door window and use it to set temp once set. Just leave it alone except to add chips and or to wrap meat if needed. 2 door design is great. I would purchase this again only thing I would do differently is pay Bass Pro where we got it to put it together. We have used it on windy days and have not had trouble with it blowing out but we are smart enough to put up a wind break like when we used to dutch oven cook. Great value for our money.

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