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Hot start problem

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bowman721

New member
I have a 2001 Bayliner with 3.0L Mercruiser. It started slow (turned over slow) when I first bought it two weeks ago. I recharged the battery, then replaced the battery, and then cleaned all the contacts - but nothing seemed to help. It also would not turn over after running for a while and getting warm. Just clicks. (by the way, assuming the temp gauge is accurate it runs pretty cool - definitely not overheating) I replaced the starter today with a new one. Seems to start better cold but still has the hot start issue. The engines starts easy - only takes a couple of cranks and runs great. Could there be some type of switch or relay that is opening up when the engine is warm? When I docked it tonight it wouldn't even make a sound or might click a few times. Any ideas would be appreciated.
 
Is the engine raw water cooled or does it have a heat exchanger? You need a thermostat. Is the alternator charging the battery? Slave solenoid may be failing.
 
Yes, the engine is raw water cooled. The alternator is doing it's job. Puts out a little over 14v when running. From what I've read, that's about right. Thanks, I'll check the slave this weekend.
 
When it won't start carefully jumper the two large studs on the slave solenoid. If the starter turns over the engine, you found the problem. Also clean and tighten the battery cables on both ends, espec. the ground on the engine block.
 
Already cleaned all of the cables including the ground at the block. I'm hoping you're right about the slave. This has been a bear to resolve on an otherwise great boat.
 
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