My 2000 Yamaha F40 is acting up. It is running rough at idle and belching gas in the exhust, it bogs a bit above idle, but is fine at mid to high RPMs. #3 plug is wet. I can unplug the coil for the #3 plug and get no further degradation in idle, but unplug #2 or #1 and it almost stalls out - so no or poor spark on #3. I can also switch the #2 and #3 ignition coil and plug wires so that I can isolate that the ignition coils and wires are not at fault, so it is not ignition coils, wires or plugs.
I've recently done a bunch of maintaince stuff, but the motor ran fine a couple trips after that (I put on a new fuel pump (because I broke a hose barb off the origional), checked/adjusted valve clearances, changed plugs, changed theromstat, anodes, etc...).
Suggestions for next step? I'm thinking wiring harness or CDI, an I way off?
I've recently done a bunch of maintaince stuff, but the motor ran fine a couple trips after that (I put on a new fuel pump (because I broke a hose barb off the origional), checked/adjusted valve clearances, changed plugs, changed theromstat, anodes, etc...).
Suggestions for next step? I'm thinking wiring harness or CDI, an I way off?