Shawn,

I don't have 5/32" ID fuel line. I use 1/8" ID (true 1/8") and that has worked great. I think it's large enough for a 150 but I haven't tried it.

It sounds like you lightened the spinner on the opposite side of the counterweight of the crank, ie- effectively increasing the crank counterweight. The spinner in mine is not ideal and the balance is in question, since I had to modify an existing 3" spinner to accept the 20x12. Spoke with Bob Obbenberger last week about a 3 1/4" spinner that's lightened and of course better balanced than mine (which was handcut with a Dremmel)

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