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  1. J

    Tach and Throttle Issues on Old Boat

    Well, I've been a boat owner for about a week, so it's time for things to start breaking. 1977(ish) Larson with 120hp Merc I/O. 1st issue I noticed when shaking it down was the tach is nowhere near accurate. It says I'm idling at 3000 rpm. Everything in this boat is original, so I know it's not...
  2. J

    Bought a Larson tri-hull, but can't seem to figure out what it is.

    Hello there forum. I bought what I was told is a 1980 Larson 18ft tri-hull. However, I think it's quite a bit older than that. There isn't any hull number on it on the outside of the transom. I found a tag on the inside of the transom with a 6 digit id number on it. It has a 120hp i/o in it, and...
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