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Old 06-26-2013, 06:42 PM   #1
Dave R
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Originally Posted by ishoot308 View Post
Needs a valve job at only 200 hours!!??.... Really??... I don't disbelieve you it just sounds crazy. I never knew they were they required that kind of major internal maintenance at such low hours...

Dan
Depends on how hard they are driven. Wear increases with the square of speed (in RPM) and internal heat (a function of how much HP is being generated) beats on the valves making them "tulip". Run those engines at 3000 RPM and they'll likely run for 1000 hours without any issues. Run them at WOT, they'll likely need a top end overhaul at 50 hours or less.
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Old 06-26-2013, 07:26 PM   #2
fatlazyless
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Depends on how hard they are driven. Run those engines at 3000 RPM and they'll likely run for 1000 hours without any issues. .
...and at 3000-rpm the boat could be doing about 45-mph in the daylight....plus the lower revs will save big on gas too!
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