Welcome aboard!
If it’s been sitting for a few years the fuel is probably bad and should be drained and disposed of. I’m assuming this is a I/O so the bellows may need replacing. Other item that may need replacing are the impeller, exhaust manifold and elbow. Under Documents you will find the Mercruiser manuals for the engine and drive, get familiar with them.
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1997 Silverton 362, 7.4 Crusaders
1997 2400 SCR, 5.7 Vortec / Bravo 2
Mike
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