New Member, 97 Speedster Timing problem

[gslewis30]

I bought a 97 Speedster last summer. Long story short, Starboard side motor runs great, Port side motor misfires back into the carb. Carbs were professionally cleaned, new fuel, plugs, etc, I even switched the carb and ignition coil from the Starboard side to the Port side and it still misfires. The magnito and rotary valve are aligned as they should be. I checked the timing and it seems as though the PTO mark is 1/4 turn off!!!, (the system fires when the piston is half way back down the jug), not at TDC or anywhere close. I can't adjust the armature plate that far..... What would be causing this incredible timing misalignment? Would a bad magnito be the issue? I'm out of ideas, any help is appreciated.

Thanks

Greg

 

[El Toro 33809]

Welcome to the forum Greg. Sorry to hear of your problem. How did you check the timing? I've never done one based on the PTO. I believe the PTO flywheel threads on and if there is a timing mark on it, where it ends would depend on how tight the PTO flywheel would be. Try posting details and any follow ups to this in the 2-stroke boat section if the forum.

 

[gslewis30]

Thanks El Toro, I re-posted the thread in that section once I found out how the site worked. I timed the motor as the repair manual explained. The stator coil was aligned back on the marks where I took it off, but those marks might be bad since it backfired before I rebuilt it. I check the timing on the PTO wheel as a reference using marks as the manual suggests. I found out it was firing as the piston was on the way back down the cylinder. The only thing I can think of is the stator coil was in the wrong mounting holes BEFORE I took it apart and rebuilt it. Since its a 2-stroke the timing should be very simple thats why I'm so confused as to why its doing this.