Barry, I had one (and sold it)
I think it might have been a short term factory piece that came in with a
plastic fan.
I'd be interested in hearing more.
Joe
> While some out there are asking questions about unknown things, I have
> one. You all know, TR2-4 owners, that our four cylinder engine has a very
> large and heavy crank extension for the fan. Where did the aluminum ones
> come from? I thought all were cast iron but I have seen two out of aluminum,
> I have one and so does a friend. Other than the material, the only other
> difference is the number of bolts holding the pulley together. It only has
> three instead of six. Thanks for any light you can share on this. Barry
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