troy-bilt weed-eater motor
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http://www.ch-ignitions.com/
scroll down on this site. there might be one you can use or adapt. But, you might seek out a friend with a lathe.
scroll down on this site. there might be one you can use or adapt. But, you might seek out a friend with a lathe.
#5
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You might want to add up the cost of converting your engine versus buying a new one. You'll need a prop adapter, new muffler, and probably some way to mount the engine. Your all in cost probably won't be far off from the cheaper 25cc-30cc engines on the market that are built for RC. And most of those will be lighter than your wacker engine and ported to make more power too.
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I make my living repairing small engines, and there is no way in the world, I would trust my r/c models and equipment to a Troybilt weedie engine. Just remove the back cover and you will see what I am talking about. They have a notoriously bad crankshaft design. The crank pin actually come loose from the crank. I have seen dozens of them that have had that happen.