Small Engines (Lawn Mowers, etc.)/Tecumseh ohh 50 timing


Can the timing be advanced on the tecumseh ohh 50 and what would be the best way to do it if so ?

Yes, the mechanical timing can be advanced but the adjustment is limited by the design the gear teath on the can and crankshaft.  To advance you will have to remove the oil pan/sump basically splitting the engine and then just advance the cam a tooth or two.

You may be able to find a Tecumsh flywheel key that will advance the igntion timing a few degrees but an advancing flywheel key may be very hard to find.  Most advancing keys I've seen are for Briggs or Honda 5HP go-cart engines.

When do you want to advance the timing?  Are you running an alcohal set-up?  If so you will need to adjust the compression ratio as well.


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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