Re: boat that does not plane out
GKS, I strongly suspect there's something wrong with the motor. Any prop that was produced for that motor, on a 15 footer, should be able to plane the boat fairly promptly with just you in it. That's a big old pig of a motor with plenty of displacement and midrange for 75hp.<br /><br />If you got pretty close to dead even 94 psi on each cylinder, I would figure the cylinders are OK. You should get around 110 on that motor, but it's virtually impossible for them to have worn exactly the same amount. Much more likely the low figure is due to a dragging starter, or just the compression gauge used.<br /><br />Did the boat plane more easily before your father in law put it away? You may just have one of the four main jets good and clogged up, so you're effectively running on 3 cylinders. Alternately, the distributor or linkage may be way out of adjustment. <br /><br />Lastly, does the motor cool OK? When warmed up, it should be around 140 degrees (if I remember right). You should be able to leave your fingers on the outside of the cylinders for 2 or 3 seconds before you have to pull them off from the heat.
