Like Tree0Likes

Engine Hours vs. Engine Miles

Old 11-02-2002, 06:34 PM
Platinum Member
Platinum Member
Steve 1's Avatar
Join Date: Apr 2001
Location: Beautiful Fort Lauderdale
My Boats: Slippery when wet!
Posts: 10,833

Lets see 3000 RPM = 75 MPH in one of my BB Trucks O.D. High Range 100 Hours at that rate =7500 Miles
Steve 1 is offline  
Reply With Quote
Old 11-03-2002, 09:08 AM
Join Date: Mar 2002
Location: Orlando, FL
My Boats: 1949 Chris-Craft
Posts: 349

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.
Gearhead99 is offline  
Reply With Quote
Old 11-03-2002, 03:34 PM
Thread Starter
Join Date: May 2002
Location: Ft. Wayne, IN
Posts: 100

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.

Ricochet is offline  
Reply With Quote
Old 11-03-2002, 05:56 PM
Von Bongo's Avatar
Join Date: Dec 2001
Location: Iowa - Missouri
My Boats: 1997 Cig Kevlar - powered by Boyd
Posts: 3,904

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.
Von Bongo is offline  
Reply With Quote
Old 11-03-2002, 07:42 PM
Bosco's Avatar
Join Date: Nov 2000
Location: Crystal River, FL
My Boats: Avanti 1986
Posts: 220

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.
Bosco is offline  
Reply With Quote
Old 11-04-2002, 07:17 AM
Offshore Addiction
Posts: n/a

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...........
Reply With Quote

Related Topics
Thread Starter
Last Post
General Q & A
07-01-2008 04:43 PM
General Boating Discussion
07-13-2007 01:16 PM
General Q & A
03-18-2005 11:32 PM
General Q & A
05-17-2004 08:19 AM
General Q & A
03-24-2003 07:32 PM

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are On
Pingbacks are On
Refbacks are On

All times are GMT -5. The time now is 06:28 PM.

Copyright 2011 OffShoreOnly. All rights reserved.