The engine starts fine on my BearTracker but it won't shut off. The engine keeps running with 1) either the main switch off or the run/stop switch off or 2) both switches off. In order to start the engine I must have both switches on. Now I turn off the gas to stop the engine.

I looked at the schematic and found both switches are wired to drive a single line (CDI out) which goes to the CDI. From the schematic it appears either switch can ground the CDI out signal which in turn kills the engine I suspect the CDI is bad and thats why the engine won't shut off. I am at a loss to explain why the engine would start if indeed the CDI is bad.

I checked both switches independent of each other with an ohmeter and everything is fine. I also ohmed out the CDI out wire and it looks ok. I guess next I will measure the voltage on the CDI out line when the switches are in the off position. If I read 0 volts and the engine is running this tells me the CDI is bad.

If you have any ideas on this let me know. I figure it will take another 6 pack to solve this problem.

45ACP

 

Hmm, i dont know how to fix your problem, but here is an easy way to turn it off without turning off the gas. just pull the Choke on full-choke, and the engine should bog down and die within a few seconds. that should work. good luck.

 

My engine won't turn off problem turned out to be much easier than I thought. The problem was dirty wiring harness contacts. I opened up the harness connector going to the CDI unit and the contacts were dirty and after cleaning up with WD-40 and re-assembling it works fine. The engine shuts off with either the main or run/stop switch now.

Now if I can only get the idle speed right. I dismantled the carb and throughly cleaned it with carb cleaner. The inside of the carb had a layer of crud. Two of the jets were plugged so I opened them up with a small wire.

Does anyone know which direction to turn the power screw to lean the engine; in or out?

45ACP