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Old 03-13-2006, 04:10 PM
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w8ye's Avatar
Join Date: Dec 2001
Location: Shelby, OH
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Default RE: os91fs and palmer plans

I've been around a lot of OS 91 Four strokes. No one has talked about breaking valve springs. I've had one about four years.

You may be running them too fast? What prop are you using? should be 13-8 or 14-6?