I bought this 1976 Spectra 20 from a guy up in Reno NV last year. In my excitement of finally buying a nice boat I hauled ass back to Vegas. My girlfriend and I took it to the river for the first run and it ran flawless. We took it out for a few more short trips out on Lake Mead, and then one weekend we decided to venture up lake further to the narrows. On our way back to Lake Mead marina we were almost back when the engine had a catastrophic failure. It sounded really bad when it went so I didn't try to start it again. We were towed back in. My brother pulled the motor and we found some pretty severe damage.
It killed the block and 2 Pistons. The lesson I learned is always check everything out on a new purchase before you hit the lake. A few stupid things I should have known to check coulda prevented having to spend $$$$ on a new engine.
When we started poking around we found the carb was too small for a 460 Ford, a 600cfm Holley with 73 in the primary and 65 in the secondary. Plus the timing was advanced about 38 degrees. If I woulda checked the jets, seeing the boat was being run at elevation, as well as put a simple timing light on it I probably would be out on the lake now. I feel pretty stupid, but at least now the new 466 BBF will be much stronger and more powerful. Gonna post some pics as my dad and myself rebuild the motor and get the it back in the "Thirst Quencher". I love this boat, can't wait to get my cruiser back out on the lake.