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I finally took my "new to me" 1972 16'7" whaler out after the winter on a local lake. It has a 1992 88HP Johnson. After a quick warm up, I took it at almost wide open throttle and it moves really nice and very fast. The thing I'm concerned with is, as I slowed it down I noticed a slight, constant shake while sitting in the boat at lower RPM's. If I stood up I really couldn't notice it. The only other boat I have owned is a 14' center console with a 15 HP four stroke which was really smooth so I'm wondering if this is a normal 2 stroke thing or should I investigate it further? It had a brand new prop installed before I bought it.
Thanks
Steve