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Old 10-10-2014, 12:08 PM   #16
MYTraveler
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City: West Coast
Join Date: Apr 2014
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Quote:
Originally Posted by caltexflanc View Post
Curious what boat that was. I take it you mean MH10 or MH11 (1.0 or 1.1 reduction, very unusual). the MH11 is rated for max shaft horsepower of 540. Those 892's were certainly way over juiced as well at 790hp. Even my MH20's were rated at 720 shaft. Yeah it sounds like that guy and whoever powered that boat didn't know their stuff. I make a habit of watching trans pressure like a hawk, including mechanical gauges right by them in the ERs. Pressure should be a min of 130psi at 1800 rpm in forward and 110 in reverse at 1500 (not that I ever went in reverse that fast!).
I probably got the model number wrong, I was doing it from memory and its been about 7 years. Definitely not 1 or even 1.1 reduction. Came from the factory with those gears and mains. Also from memory, my mechanic had reduced the pressure to 130 (the low end of the spec range), but after the new gears were put in we ran them right up to 160, the high end of the spec range.
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