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post #2 of Old 08-03-2010
RichH
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If the engine was 'run hard', reasonably maintained, etc. such QM engines 'can' easily reach 8000 to 10000 operating hours.
What typically destroys most marine engines is 'rust', from the 'inside'; the outside was designed for contact with the 'marine environment' and usually includes a hefty amount of 'corrosion allowance'.

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