OMC 5.0 L Engine<br /><br />The engine will turn over, but it will not start. Actually, sometimes it will start, but then dies after a few minutes.<br /><br />One other problem: sometimes the entire engine unit shakes for several minutes after it starts.<br /><br />Any suggestions on what could be wrong?<br /><br />It's NOT the starter, b/c I've already had this replaced.<br /><br />Thank you!
<br />You left out all the pertinant info: year, when and how this problem began, (after sitting 12 years? after a fuel fill up? after you heard loud knocking noise from engine?), maintainence,etc.<br /> <br />Wild guesses?<br /><br />Fuel: old fuel, water in fuel, clogged filter, etc<br />Choke: Sticking open/closed<br />Bad distributor cap: cracked, corroded, etc<br />Plug wires: fell off, miswired from prior work, etc<br />Fuel Pump: diaphram failed (won't leak on a marine engine when it does)<br />Timing: been moved and way too far advanced/retarded?<br /><br />Or 1,000 other things.<br /><br />Post more info. <br />