Small Engines (Lawn Mowers, etc.)/GX 140 honda


this is an older motor, not a clone. Has been used in a wood splitter configuration. It is very hard starting, when started runs great. I tried disasembly and soaking carb, blowing out with comp air reassemble. It wants to backfire thru the carb. It wants to start but will not take. It also kinda flutters as it wants to start. Is the problem still possibly the carb? REad you may have to soak a couple times. How critical is valve adjustment. I didn't have a feeler gage at the time, but had the valve cover off and the rocker was lose enough to wiggle but no slop.

Is the intake valve sticking?  You try some Valvoline carb cleaner spray and clean the intake valve.  Remove spark plug, spray valves, rotate engine, and spray again several times.

Make sure the intake valve closes quickly.

Have you replaced the spark plug?

Improper valve clearances could cause the problem but make sure they are working properly first.

Valvoline carb cleaner can be found at Advanced works well for cleaning varnish.


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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