How To Clean / Rebuild B&S Walbro LMT 2 Piece Carburetors



In depth video on the newer style carburetors found on single cylinder Briggs and Stratton engines on riding lawn mowers, this one in particular came off a 14.5 HP B&S OHV engine, newer models will have a fuel solenoid on the bottom. Thanks for Watching!!!

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24 thoughts on “How To Clean / Rebuild B&S Walbro LMT 2 Piece Carburetors

  1. This is one of your best videos … but they are all good! That being an older carb, I guess that's why it has no solenoid. Friend has a 14.5 Briggs with the LMT carb. Solenoid was funky so he cut off the plunger, then the carb worked fine. For whatever reason, it doesn't seem to backfire either. Why do you think this is? Final question: some say to add a fuel shutoff valve if you disable the solenoid. Is this necessary?

  2. Thanks from the UK for a very informative video. Unfortunately the brass main jet has resisted my attempts to unscrew it completely as the corrosion near the top of the aluminium housing made it bind and the slots have rounded off. Looks like I'll be applying some heat and a stud extractor to remove it and buying a service kit.

  3. Good vid as usual. I have bent the plastic floats with heat from a heat gun to make them seal off once again. I have trouble with the newer carbs, even after cleaning I can't stop some of them from hunting. (reving up and down) Any suggestiond

  4. Great video!  I need your opinion.  I picked up a mower that sat with old gas in it for years. The carb is really varnished up.  I'd like to soak it overnight in Berryman's Chem-dip, but can you tell me :  Is it safe to soak the Walbro LMT with its plastic fuel inlet elbow in place?  I don't want to have to replace the elbow, but I also don't want it to dissolve in the Chem-dip!  Any advice?

  5. Good video, thanks for sharing it. I'm working on an LMT right now. The long tube you removed is the emulsion tube. Have you ever had to replace one, and if so, where did you order it from??? The one I have is almost stripped out on the head. Any info would really be appreciated. Thanks again.

  6. Question: I have one of these carbs on my 13.5 hp Briggs. Pulled the bowl off and cleaned everything. Pushed the float up and tried blowing thru the fuel port and it closes. Put everything back together and when I turn the fuel valve on……it doesn't happen really fast but over the course of about 10 minutes with the engine not running….fuel will flood the cylinder. Will a new float and needle valve fix this?

  7. I have the newer LMT carb. Where you took that flat screwdriver jet out, mine doesn't have that. There is just a small brass looking like ball. Does that come out?? I race mowers and this last weekend I could not get full throttle cause it sounded like it wasn't getting fuel. Also the plug was white from running lean. Any ideas. Great video by the way

  8. Thank you for this video! I just got a riding mower with that carburetor on it and it started blowing gas into the block. My local small engine repair shop sold me a needle valve and a brass sleeve. Had no Idea how to replace it. Now I do. Thank you!

  9. Thanks for the video! This one was shooting gas everywhere when I tried to start it. I took it apart and cleaned everything. It was nasty!! Hopefully that was it…I'll find out tomorrow since I will have to change the oil since I'm sure gas went in the crankcase.

  10. Great video to help my 12 yo son and I trouble shoot an over revving 10.5HP Briggs ride-on engine. Once we pulled the Walbro LMT apart we found the round flap on the throttle spindle lodged in the manifold, the 2 screws nowhere to be found! Seen this before? Should we pull the head off to look for the screws? I'm also wondering were to get replacement screws. Love your work.

  11. It looks to me like the brass float needle seat is missing from that carburetor. IF so it's no wonder the float won't stop fuel flow. The brass seats are pressed in the tapered hole you were dropping the float needle into.

  12. Extremely few repair videos I'll watch for more than 2 or 3 minutes without skipping around to the relevant parts. You covered pretty much everything that needs to be covered in just the right amount of detail without a bunch of wasted time. Great job on this video.

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