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Thread: mercury 150xr6
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08-08-2017, 09:55 AM #1Junior Member
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mercury 150xr6
good evening
i have amercury 150 xr6 2003y/o with 150hours
And in my last boat ride after 10 miles stop the engine and all is good after 2 hours try to start the engine and the engine don t start,I opened the left head and the 6 pistons is Has been destroyed.
Do you know why this happened? I did not have any temperature at all.
thank you
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08-08-2017, 10:18 AM #2Junior Member
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08-08-2017, 12:46 PM #3Member
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Looks like one cylinder ran lean
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08-08-2017, 02:27 PM #4
Detonation due to lean or timing high on that cylinder. Need to go through fuel system thouroughly and index flywheel for that cylinder and check wot timing on #6. When I had a new set of switchboxes that had a bias problem, #6 was the cylinder it would fry, found it had 5 degrees more timing than #1.
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08-09-2017, 04:00 AM #5Junior Member
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thank you for reply.
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