The casting number on the ring gear is “203,486”. It has an “S” in a circle beside it. I will have to take a few things apart to get to the existing fly wheel. I do know it is original because I bought the boat from the original purchaser. Because the ring gear is so thick, the starter pinion would still be in “interference” with the gear in its retracted position.

Once I compress some photos I took, I will send some.

Dan Z

Casey & Outbboardnut,
I really appreciate your supplying information about my conversion! I just checked my flywheel number and it is #580191. So it appears that I not only need the correct ring gear, but I need the right flywheel as well. The ring gear I received from this “OMCman” in the conversion package I purchased on Ebay has a number 203486. The starter and bracket are #30508. So if I understand things correctly, I still need to find the correct Flywheel, Ring Gear, Starter & Mounting Bracket. The one thing I do have that I can use from the “conversion kit” is the starting solenoid and ignition wiring.
I do have a few other questions:
Are any of starters interchangeable with the different brackets?
If I just use a solar battery charger to charge the battery when not in use, do I really need a generator? How many “starts” can one expect on 1-charger on a good battery?
Where is the best place to find the parts I need? This site is a great venue however are their other options?
I know these parts are somewhat rare, but I am so close to the finish line on this 3-year restoration that I can’t let a few more dollars stop me.
The idea of using a CNC machine if all else fails is a great idea.
I am still trying to find a way to reduce the size of my photos taken with my “iPhone”. My laptop uses Microsoft “Windows”. I have many photos I would like to share.

Thanks again, Dan