Small Engines (Lawn Mowers, etc.)/LT 946H/ENG TVT961-600810B


Problems with this mower, I had it in the starter, carb cleaned, valves adjusted..then a month later wouldn't start, bought and replaced alternator, plugs, solenoid, battery and two new coils.  Mower seemed to want to start,but whined..instead..Not sure what to replace next..I did get a new ignition switch I'm going to put on and a new fuel pump, but after that I'm totally out of ideas..  Spent to much money on it to trash it now... :(

It the TVT a Tecumseh engine?  I can't seem to find the engine parts diagram.

As many items have you have replaced I would start by performing an engine leak-down test to verify all the internal engine parts are fine, piston, rings, valves and head gasket.

Since so many parts have been replaced and the engine it still giving you problems I would carefully check the head gasket to see if it is leaking and check the head bolt torque.

For troubleshooting small engines I always start by checking spark, making sure the ignition system is working.  Next I prime the engine with fresh fuel and try to start it.  If it tries to start then the ignition, compression and timing are fine.  This leaves only the fuel/carburetor.  This is a quick and effective method to identify what main system is causing the problem.

Let know if the engine is a Tecumseh and re-check the model number.


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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