I recently purchased a new boat with a 496 mag. At approx. 3.5 hours the serpentine belt broke. Brought the boat to Mercury Marine rep. & a new belt was installed. At approx. 8 hours the belt was thrown off the pulleys. Brought the boat to Mercury Marine rep. again & they found that one of the pulleys was out of alignment 1/8 of an inch. With approx. 28 hours the belt was thrown again. It is currently at the Mercury Marine rep.shop again,third time.
Does anybody know of any simuliar problems with the 496 mag ?