Small Engines (Lawn Mowers, etc.)/mtd lawn flite


I had trouble running my lawn flite  engine it is a briggs&stratton 18hp twin. i replaced the fuel line in total , then cleaned and replaced all gaskets and pump diaphram in the carb.
it ran perfect after that. it has been lying for the past 2 months and i am getting the same problem i had before. wont run without choke.

I'm not sure how fuel is in the the UK but in the US fuel (gasoline) with ethanol goes bad in a very short period of time.  

We recommend customers use a fuel additive stabilizer with all their fuel.  If their fuel is 2 months or older, without stabilizer, then they should properly dispose of it and get new gasoline...and add stabilizer.

Since you have to have the choke on the engine is running lean.  

Did you remove, dis-assemble, and clean the carburetor with compressed air from an air compressor and spray can carburetor cleaner?  You need to make sure and blow air through all the carburetor orifices to ensure there is no blockage.

I'd start by verifying the fuel it good and then move on to a carburetor cleaning.

Let me know if this helps.

Small Engines (Lawn Mowers, etc.)

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Eric A. Jones


Lawnmower Repair . Certified Master Service Technician from B&S. Have 23 years experience on B&S, Lawn Chief, Weed Eater, Echo, Peerless, Wheel Horse, Snapper, Atlas, MTD, McCulloch, Homelite and many other numerous brands. Specialize in electrical repair.


Born and raised in the midwest. Started tinkering with engines when I was about 14 on my Suzuki RM-80. I began lawn mower repair at a small hardware store. I knew absolutely nothing. I read lots of repair manuals and met an older fellow who taught me many lessons. I continued working on small engines through high school and paid my way through college working on mowers at the same hardware store. Decided to get away from the midwest and mower repair so I joined the Air Force. I repaired air traffic control electronic equipment and ended up in Hawaii where I got a part time job at Small Engine Clinic. I gained a lot of experience from the Small Engine Clinic and had a blast repairing small engines. I then took the Briggs and Stratton Master Service Technician test and earned my MST. I then traveled to Wisconsin where I attended the factory update training seminar and received formal training. Continued working on mowers part time as I completed 20 years of military. Retired from the military on a Friday and continued in the lawn and garden industry the next Monday.

MAS Aerospace Operations BA Mathematics AAS Electronic Communications AAS Electronic Technology

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