Re: Restarting 5.7Merc winterized in 02
The boat may be an '87, but that K series engine is around '96.
After the oil has set per Bruce, turn it over a few times by hand. Certain cylinder valve springs have been compressed for 8 years. After spinning the oil pump, would use starter with plugs removed to spin up, to try to get some oil in the lifters. (cover carpet from oil coming out plug holes)
Rust on any plugs means water leaked in. Valves maybe rusted, and further tear=down may be needed.
If gas was left in carb, that will probably need a good teardown and cleaning, but could wait until start-up.
Normal tune-up stuff, plugs, rotor, distributer cap. Oil and filter, water sep filter. Drive oil change.
Careful inspection of bellows before splashing the boat for first time and do recommend changing impeller. I would do via drive removal, and also check the engine alignment, and easier to see if there was any water in the u-joint bellows, that might have rusted things significantly over 8 years.
PS: Noticed that there was no risers between exhaust manifold and elbow. I would have thought that a deeper hull like this would have them.
