Your very lucky. Those are rare and very unique for that era. Have you tried RCPW? Its $58 which is high to me. I get alot of used stuff so look around for any D-400 coil, it will work. Good luck. Here is a link that might be useful: rcpw

Hi Walt, Thanks as always with your great help. I appreciate it! My mower us the 8230, a 1972 self propelled model, D640 block, and the self propel drive shaft entering the rear of the engine at deck level. The new 'donor' engine assembly is labeled as "D600, part # 679907" and is new old stock parts out of a box, not from a specific mower model. I am guessing without actually buying the new assembly, and doing a side to side comparison, it is a bit of a guess as to compatability?

Well you don't seem to be getting much response. I just use a small screw driver to pop the old seals out being very careful to not damage the crankshaft seal area. IF they are stubborn, I drill a small hole in the middle of the metal part, run a small metal screw into it and pull on that. Install using a pc. of plastic pipe or something similar to drive them in place. I have no special tools. Walt Conner

John, I'd imagine you are talking about the adjustment handle that sticks out the back of the deck... the one that controls both rear wheels? I have an 8237 that I'm most likely parting out. Tightest F engine I've seen but too many other problems to list. Probably will shrink wrap the engine in case I ever need one for my 8241. Anyway, if it turns out to be the same part I'd be happy to help.