I have a 1988 Johnson 25 HP with electric start. The holes where the starter bolts to the powerhead One the side is busted off and the other is stripped out. The motor has about 92 PSIs on the top cylinder and the bottom cylinder is sitting at about 95-97. It does have good spark but does not act like it wants to start even if I put fuel oil mix directly into the cylinders or squirt into the carb. My question, is this motor worth my time or putting money into for repair? What would be a fair ball park figure that it should take to put in shop and get this running?