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General Jet Boat Discussions
Please help having trouble with 2003 Mercury 60/40
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<blockquote data-quote="rotus623" data-source="post: 433501" data-attributes="member: 15266"><p>Wow, sounds like you have been doing your homework!! I am assuming that compression on this motor is 120 on all 3 or better??</p><p></p><p>How do plugs look after a WOT run and shutdown? Literally run it WOT for a few minutes and then back her right down and turn the key off. Is there water on your plug/s? Do the faces of the pistons look steam cleaned at all? What you are describing is a classic water into the cylinder issue.</p><p></p><p>These blocks are pressed together, as they have no head gasket. (Pain in the arse), and what I have heard is they are notorious for hairline cracks in the waterjacket, allowing a very fine mist of water into the cylinder.</p></blockquote><p></p>
[QUOTE="rotus623, post: 433501, member: 15266"] Wow, sounds like you have been doing your homework!! I am assuming that compression on this motor is 120 on all 3 or better?? How do plugs look after a WOT run and shutdown? Literally run it WOT for a few minutes and then back her right down and turn the key off. Is there water on your plug/s? Do the faces of the pistons look steam cleaned at all? What you are describing is a classic water into the cylinder issue. These blocks are pressed together, as they have no head gasket. (Pain in the arse), and what I have heard is they are notorious for hairline cracks in the waterjacket, allowing a very fine mist of water into the cylinder. [/QUOTE]
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Please help having trouble with 2003 Mercury 60/40
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