I'm starting to get frustrated...
2000 25 Yamaha four stroke. I'm only getting about 3000 RPMs off of either plug wire, this prop should be getting almost twice that. The motor starts, idles, and runs smooth.
I just had it in the shop and they found a broken magnet on the flywheel that was causing a knock and cylinder not to fire. That was a $750 fix, but it's still knocking and not turning enough RPMs.
Here's a list of everything I've done so far:
New oil and filter
De-carbonized the motor
New lower unit oil
New fuel filter
New water separator filter
New gas with stabil and ring free
New thermostat (old one was stuck open)
New fuel pump
New belt and set the timing
Checked the valve clearance (only one exhaust valve was just a little off)
New plugs (gapped properly)
Literally the only thing I haven't done is rebuild the carb, only because I'm still waiting on the kit. I checked the throttle cable and the carb is wide open when the cable is maxed out. But I seriously doubt it's a carb issue, otherwise it wouldn't start idle and run so smooth. It has to be an ignition issue, right? Think the stator got damaged from the broken magnet? Ideas, thoughts?
Edited by StumpJumper1 (01/05/16 02:57 PM)