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  1. #11
    Platinum Member Platinum Member Steve 1's Avatar
    My Boats:
    Slippery when wet!
    Join Date
    Apr 2001
    Beautiful Fort Lauderdale
    Lets see 3000 RPM = 75 MPH in one of my BB Trucks O.D. High Range 100 Hours at that rate =7500 Miles
    Slippery when wet. "POD" Free Tunnel through Common Sense Engineering

  2. #12
    My Boats:
    1949 Chris-Craft
    Join Date
    Mar 2002
    Orlando, FL
    Just rule of thumb...when high reving gas engines, mostly in high speed boats, reach the 400+ hours range they are worn pretty badly.

    High speed offshore boats, ski boats, etc.

    Sure you'll always find the exception. But, remember the boat engine doesn't coast. Also, most of the cruising is done at 3000 rpm's and above.

  3. #13
    Join Date
    May 2002
    Ft. Wayne, IN
    Thanks for the input guys!!

    Gearhead99, thanks for that info. I see alot of boats w/ motor hours in that range. Definitely a red flag, huh??

    CustomRigger101. Actually the more beers I drank, the more I understood your posting. I just needed to be in the right state of mind.


  4. #14
    Registered Von Bongo's Avatar
    My Boats:
    1997 Cig Kevlar - powered by Boyd
    Join Date
    Dec 2001
    Iowa - Missouri
    If you are afraid of the hours on a boat you should have the engine(s) surveyed. You can buy a boat with 180 hours and not have a healthy power plant if it wasn't broken in right, service timley, or flushed if it is a salt water boat.

    I don't exclude a boat just because oh hours.

  5. #15
    Registered Bosco's Avatar
    My Boats:
    Avanti 1986
    Join Date
    Nov 2000
    Crystal River, FL
    Try this math, I run hard on the highway at 100 mph. Maintain the car properly and run 100,000 miles. Simple division and the motor goes 1000 hrs just fine.
    I have had many people mention rebuilding after only 500 hrs. possible for racing conditions when all means all, and the first one across the finish line wins.
    However on a pleasure boat, you or I would never even notice the power loss. Keep up on it and change the oil regular and I can tell you they can go a bunch further. I.E GMC pick up with 180,000 miles on it, Yamaha outboard with 1,800 hours on it, Honda 929 with 29,000 miles on it. Thay keep going and going so long as you keep up with the maintanance.

  6. #16
    Offshore Addiction
    dont know an eqaition for it,but in doing a ton of insurance work,the insurance companies consider 100 hrs=to 10 thousand miles,and prorate from there...........

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