AboutEric A. Jones Expertise Lawnmower Repair . Certified Master Service Technician from B&S. Have 13 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.
Experience 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. I received a scholarship from the Air Force and am currently pursuing another degree.
Question I have a Weed Eater Leaf Blower Model BV1650. Ran fine then all of a sudden stopped. I cleaned the fuel tank filter and check it; you can suck air through it. I have replaced the fuel supply hose and then replaced the Walbro carburetor. Spark is strong and compression is over 90 PSI. I can get it started but it will only stay running for 30 to 60 seconds and will not take any throttle. I have tried running it with and without the muffler. I have heated the muffler to cherry red to make sure it was not blocked with carbon. The piston looks in fairly good shape through the exhaust port. No major scratches. No adjustment to the carburetor seems to make a difference. What next?
Answer Crankcase air leak? When you replaced the carburetor did the carburetor gasket line up with the carburetor pulse hole?
The rear crankcase cover has an o-ring to seal the crankcase. I have had these o-ring leak causing problems like yours. Remove the cover, clean the o-ring, housing and crankcase with brake cleaner. Use Permatex 3 non-harding gasket sealer and apply a bead on the o-ring and then re-assemble.
