I have a 1992 Riviera Cruiser 24' pontoon boat, I love it, but I have this terrible engine. Mechanic says the bottom chamber has no compression $1500 to fix, looks like I need a new power tilt and throttle as well. Should I dump the engine and repower? What engine do you recommend? 90 - 120 HP. What can I expect to pay? What is the best way to find out the value of a used boat and engine? Thanks!