Reply To: Backfire/misfire thru carb

[Don]

OK, well a jammed mag plate will certainly affect sync and running for sure. The sensor/trigger assembly has two different bushing surfaces. One is the pilot bushing on the inside diameter of the upper bearing assembly. I guess it would be possible to spray WD40/PB blaster through one of those puller holes, it will probably make its way down to the pilot bushing. The other surface is the plastic bushing that rides on the outer diameter of the assembly and sits down on top of the outside of the upper bearing assembly. You can see what appears to be a white plastic washer between the sensor assembly and upper bearing. You can try spraying the WD40 around where the plastic bushing is, it might work its way inside. It will be difficult to see this on your turbo jet.
To remove this flywheel, you will need the OMC puller assembly, don’t attempt it with a substitute puller. A big impact gun will remove the flywheel nut, and can be used on the big center puller screw for flywheel removal. Reinstallation will require a big torque wrench and a ring gear holder tool to secure the flywheel while using the torque wrench. Will get back to you with the torque spec.. Unfortunately, sounds like someone left water in this unit during the winter and popped the adapter open….What a mess.
I should have asked how you were running the engine prior to now, seems like you were running it with no water…Won’t hurt anything on this unit, there is no rubber impeller. But, running the unit out of water reduces back pressure and could cause the unit to run lean/sneeze at idle. Maybe a good welder can patch up the cracks…Unfortunately, these turbo jet units were not OMC’s finest hour….