1993 Quadrunner 300, no spark ONLY with pull-start
Posted 14 March 2010 - 10:38 AM
I put the starter back together and tried firing it up with the pull-starter. It backfired through the carb. every time it hit the compression stroke. So, thinking I might have had the carb. pilot screw a bit lean, I turned it back in 3/4 turn. Put the carb. back on and now it has lost its' spark again with the pull starter. But again, it will spark with the electric starter, and it still will not engage the flywheel. I rechecked my new connections with a test light, and they are ok. The fuse is still good and I sprayed everything down with contact cleaner.
Why is it producing spark only with the electric starter? Does this indicate a CDI problem, or is there something else that might be wrong? The kill-switch is working fine. It stops the spark when it is off (electric start) and sparks again when on.
I'm at my wits end with this machine. I have a lot of time invested into it and I hate to sell it. But I have already listed it on the local classified website. If I do decide to sell it, I'd rather have it running, but I'm not spending anymore money on it.
Any help is greatly appreciated.
Posted 17 March 2010 - 07:22 AM
Posted 17 March 2010 - 12:44 PM
I honestly just think there is a short somewhere in the harness, but when I was rebuilding the engine, I went over every connection I could find. I greased all of them, but that's not to say something didn't get pulled apart or a wire didn't ground out against the frame when I had it out for its' initial trail ride. I swapped out the CDI with another buddies unit from a `91 machine. Same part #, but it wouldn't produce a spark with either the electric or pull-starter. Not sure what was going on there. We haven't actually heard his machine running yet, as it was bought as a parts ATV, but were told that it had been running.
As well as the starter, I also picked up another used voltage regulator. Just as a spare, I don't believe that is the problem but I will swap it out just to try it. That's if the starter swap doesn't change anything.
Edited by clSharky, 17 March 2010 - 02:16 PM.