Didn't all 69mm stroke cranks use a flywheel with the 0-ring? I'm not real familiar with 67 and back stuff, but I'm thinking I've seen "6 volt" flywheels that used an O-ring. When did they add the O-ring?
I bought a 40 horse engine to go in my still 6 volt 63, but couldn't get it in the transaxle. It turned out to have a "12 volt" flywheel, but with a 180mm clutch and (if I remember correctly) no 0-ring grove. I've seen and heard all kinds of other "situations" with the flywheels, and the more I learn/see/hear, the more confused I get.
Here's what I "think." David, please let me know if these are true assumptions.
There are two sizes of clutch disc. Anything that originally came with a 1300cc or smaller engine used the 180mm disc. All 15-1600cc engines used the 200mm disc.
Before a certain date, all flywheels sealed to the crankshaft with a paper gasket, after that date they had an o-ring. I have no idea the date. There is something different about the crankshaft as well as flywheel (I don't remember exactlly what it is with the crank) so these don't just mix and match.
All VWs with 6 volt electrical systems used a 109 tooth starter ring gear on the flywheel. All 12 volt VWs used a slightly larger gear with a few more teeth.
If all we ever had to deal with were Beetles made in Germany and bound for the US, it would be cut and dry. But it's not that easy . . . 12 volts came out as an option on the buses as early '64(?). The buses got larger engines sooner than the cars. So did the type 3s. A 12 Volt 40 horse was an option as late as the mid-80s, maybe even into the 90's on Mexican Beetles. Overseas, 1300 dual ports were offered . . . who knows what kind of flywheel they had. Then, there is the issue of industrial engines . . . they were offered in all kinds of sizes and configurations for many, many years. Somewhere I've seen (In Muir's Idiot Book, I think) a referance to an engine code for a 36 HP industrial engine built in the late 60s or early 70s.
Anyway, it's late. I gotta get up early. Now I have a headache 'cause my next to the last working brain cell is going into overload. I'm going to bed. Maybe it'll all make sense tomorrow.
Maybe not. :p
:cool: