Small Engines (Lawn Mowers, etc.)/follow-up to previous post


QUESTION: I took the carb off and replaced the float pin, needle. Cleaned the bowl main jets again and hopefully cleaned the other jets also(sprayed carb cleaner down through the carb shaft). Replaced the gaskets. Started the mower up and started the surging again. I let it run a little while and then the surging smoothed out. However, doing a restart is almost impossible when the engine is shut down and restarting. Any more ideas? I'm going to check the spark lug when it cools down. Thanks again for ideas.

ANSWER: Remind me which engine you have, Briggs, Honda, Tecumseh?  What is the engine model, type, and code/spec/serial number so I can look up your carb.


---------- FOLLOW-UP ----------

QUESTION: It's a Briggs / Craftsman - family 6HP XBSXS1901VC, rw5my12H8022639B10103201FA.  As a followup, the primer bulb is not priming.  I replaced the bulb and still no priming.  When the priming didn't work, I removed the air filter box again and left the breather hose connected to watch when primer bulb pressed.  Could not see and fuel running through the breather hose nto the air filter.  Could it be that I messed something up in the carb?  Other than the gaskets and O-rings, the only thing other than that that I replace was the float pin and needle.  That only goes one way.  The breather hose seems OK - maybe with age the hose dosen't retain it's vacuum. I also noticed that when I tilted the mower slightly - gas tank up, some gas was leaking out.  Didn't see where it was coming from. Maybe the O-ring on the float bowl was in place?  Thanks..

Did you replace the gasket between the carburetor and the air filter housing?  These almost always tear when taking the air filter base off the carburetor.

You should be able to see a small amount of fuel coming from the middle of the carburetor when you press the primer bulb.  If you can not see any fuel then either the primer bulb is leaking (not sealing), the gasket is tore, or the carb orifice is plugged.


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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