Small Engines (Lawn Mowers, etc.)/tecumseh HM100 159400R


I have the above engine on a 34 ton log splitter , due to my age I would like to convert to electric start.  I am having difficulty locating part number to a tooth flywheel.  I did find one from a 10hp chipper (battery start) however it is smaller in diameter could not locate p/n only has cast numbers 118P and 13-0 50.  Any help would be welcomed

There are many questions that one must answer to equip a Tecumseh engine with a 12 volt starter. Tecumseh does not offer a 12 volt kit. Their engines just come in to many variations.

The first question: Are the mounting bosses (places) machined and drilled to mount a starter? If the answer is no you can stop right here. It can't be done. Next, does the flywheel have a ring gear on it? You must remove the shroud and look. After these 2 questions are answered you need to arm yourself with the answers and the model spec number. Now with that info we can answer your question. And list what individual parts are required.

In addition, it will have to have a charging system installed as well as a wiring harness, solenoid, and starter switch plus a batttery box, battery, battery hold down... fueses and much more.

I believe the Tecumseh 611093 Flywheel is the one you need.  You will also have to buy an alternator.  Does the block have the mounting bosses for an alternator?

Would is be easier and not much more money to just buy a new or used engine?

Here's one on Ebay, you can email and ask if it has a 12 volt starter.

Used flywheel are around $90, alternator $20, starter $40-100.  Guessing at least $250 by the time you are done.  New engine?

You could buy one of the cheaper China made Honda knock-off engines for less than $350.  They run pretty good.   The only downside is finding parts if/when you need them.  You will have to order online and they usually just sell complete carbs rather than overhaul or individual parts.

For the money they are hard to beat...just not USA made.


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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