I believe that my forward gear is gone out on the lower unit, and was wondering if anyone had any diagrams, pionters or things to be a ware of when taking it off? serial # is 7218274. The reason i believe this is a still have reverse put no forward, and if you pick the trim up you can get it to engauge put soon as you put it in the water and there is resistance then it starts to slip and make grinding noise. If anyone could help me out in anyways that would be greatly appreciated. Thanks