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I purchased my new Sweetwater 2021 2286 in July, first time out the tach wasn't working right, called the dealer,took it back to them they put a new tach in it. We take it out doing the same thing. Call them up, take it back to them, they said the tach needed to be synced to the boat. Pick it up take it out, does the same thing. Take it back to the dealer and they said they put another new tach in it, I pick it up, take it out. Doing the same thing. After about a hour or two the tach just berries itself over 7000 RPMs and some times clear over in the fuel gauge. I've had the boat 6 weeks and it's been at the dealer 6 weeks. Still not fixed and now it's time to winterize it.