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Small Engines (Lawn Mowers, etc.)/tecumseh vantage 35 petrol lawnmower


QUESTION: good morning from the UK i have replaced the coil ,plug cleaned the carburetor out reset the coil gap numerous times still only a weak spark & wont fire what the next set of checks? magnets on the flywheel are strong hold a large spanner have taken the flywheel off & the key is fine removed the kill switch swell still a weak spark any advise would be much appreciated i am an soap living on a budget & would like to solve the problem! thanks for your time in anticipation, den.

ANSWER: What is the air gap between the coil and flywheel?

Will the engine start if you remove the air filter and prime with petrol directly into the carburetor?  I use a small bottle with a tapered tip for priming.

Service manual:

Let me know if the engine will start by priming.

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

QUESTION: hi the gap between the coil & flywheel is the thickness of a business  card i think about 13-15 thou tried priming yesterday still no joy! should i take the hole body off& prime it as i only poured it down the top of the  body! thanks

Coil gap should be fine.  You should not need to remove the whole carb body for priming, just the air filter cover and air filter.

If you can not keep the engine running by priming then there is another problem besides the carb.

Are the head bolts at the proper torque?


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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