Notices

Boat engine hours

Old 08-26-2015, 04:27 PM
  #1  
Senior MemberCaptains Club Member
Thread Starter
 
slper's Avatar
 
Join Date: Feb 2007
Location: Lakeland, Fl
Posts: 4,554
Received 1,045 Likes on 457 Posts
Default Boat engine hours

Question, is there a hour translation to miles in the marine indusrty?
In the Fleet maintenance world, in a diesel engine, the industry standard is 1 hour = 40 miles. This factor is inclusive of PTO time and factors in fuel delusion, TBN's, TAN's and break down of viscosity.

Anybody know if 1 hour on an outboard has an miles traveled factor?

One of those pondering moments.

Thanks,
Scott
Old 08-26-2015, 04:37 PM
  #2  
Admirals Club Admiral's Club Member
 
Join Date: Sep 2012
Location: Destin FL
Posts: 2,675
Received 247 Likes on 104 Posts
Default

I would think there is too much of a variable for an algorithm on outboards. For example a 15 horse outboard on a 14 foot aluminum boat will have less miles traveled than say a contender with twin 250's with the same running time. Take into consideration those who troll 90% of the time and those who bottom fish or idle around the harbor.

I too wondered this but just way to many variables.

I think that's what you're asking...
Old 08-26-2015, 05:12 PM
  #3  
Senior Member
 
Join Date: Oct 2014
Posts: 5,764
Likes: 0
Received 2,132 Likes on 1,135 Posts
Default

I'm curious how a diesel hour eqates to 40 miles? Is that 40 over the road miles, cause there aren't too many boats doing a constant 40 MPH.
Old 08-26-2015, 05:25 PM
  #4  
Senior MemberCaptains Club Member
 
Join Date: Nov 2004
Location: Amelia Island, FL
Posts: 4,782
Likes: 0
Received 111 Likes on 49 Posts
Default

Newer outboards have the RPM data logged. It is the only way to determine potential mileage, on that specific boat.
Old 08-26-2015, 05:25 PM
  #5  
Senior MemberCaptains Club Member
Thread Starter
 
slper's Avatar
 
Join Date: Feb 2007
Location: Lakeland, Fl
Posts: 4,554
Received 1,045 Likes on 457 Posts
Default

Originally Posted by YFMF View Post
I'm curious how a diesel hour eqates to 40 miles? Is that 40 over the road miles, cause there aren't too many boats doing a constant 40 MPH.
Yes, over the road...
Old 08-26-2015, 05:34 PM
  #6  
Senior MemberCaptains Club MemberPLEDGER
 
Join Date: Feb 2003
Location: Hammond, LA
Posts: 17,424
Likes: 0
Received 34 Likes on 26 Posts
Default

Originally Posted by slper View Post
Question, is there a hour translation to miles in the marine indusrty?
In the Fleet maintenance world, in a diesel engine, the industry standard is 1 hour = 40 miles. This factor is inclusive of PTO time and factors in fuel delusion, TBN's, TAN's and break down of viscosity.

Anybody know if 1 hour on an outboard has an miles traveled factor?

One of those pondering moments.

Thanks,
Scott
why would you care how many miles an outboard has run?
wear and tear on the boat itself would be affected by miles, but the outboard is in the water no matter what
Old 08-26-2015, 05:51 PM
  #7  
Senior MemberCaptains Club Member
Thread Starter
 
slper's Avatar
 
Join Date: Feb 2007
Location: Lakeland, Fl
Posts: 4,554
Received 1,045 Likes on 457 Posts
Default

Originally Posted by cgrand View Post
why would you care how many miles an outboard has run?
wear and tear on the boat itself would be affected by miles, but the outboard is in the water no matter what
Being the inquisitive person I am.... I was curious on many levels, One is how did the manufactures come up with their 100 hour oil change parameters for a 4 stoke. 100 hours equals how many miles. It that to soon, to late? Is it possible to run synthetic and stretch it like most everyone does in a car, should I change it sooner than 100 hours. Those thoughts...
Old 08-26-2015, 06:03 PM
  #8  
Senior MemberCaptains Club MemberPLEDGER
 
Join Date: Feb 2003
Location: Hammond, LA
Posts: 17,424
Likes: 0
Received 34 Likes on 26 Posts
Default

engine hours is all that matters
no other machine has a maintenance schedule based on miles except a car
mowers, tractors, generators, equipment etc are all about hours

to answer your question as to how mileage came to be the benchmark for autos I can only assume it's because that was more relatable to actual use
Old 08-26-2015, 06:12 PM
  #9  
Senior Member
 
Join Date: Oct 2014
Posts: 5,764
Likes: 0
Received 2,132 Likes on 1,135 Posts
Default

Woulden't it depend alot on how you use your engines? I know guys that have a slow speed zone out to the bay, once they hit the bay they either drift or troll at the same slow speed of maybe 5 MPH.

I doubt that puts nearly as much wear on an outboard as someone banging through 3-5' ocean waves at 3/4 throttle?
Old 08-26-2015, 06:18 PM
  #10  
Senior MemberCaptains Club Member
Thread Starter
 
slper's Avatar
 
Join Date: Feb 2007
Location: Lakeland, Fl
Posts: 4,554
Received 1,045 Likes on 457 Posts
Default

[QUOTE=YFMF;8193529]Woulden't it depend alot on how you use your engines? I know guys that have a slow speed zone out to the bay, once they hit the bay they either drift or troll at the same slow speed of maybe 5 MPH.

I doubt that puts nearly as much wear on an outboard as someone banging through 3-5' ocean waves at 3/4 throttle?[/QUOT


One would think that. But I would think that in the over the road diesel engine app 1 hour would certainly equal more than 40 miles but it doesn't... I don't know, I was just curious...
Old 08-26-2015, 06:24 PM
  #11  
Member
 
Join Date: Aug 2015
Posts: 69
Likes: 0
Received 1 Like on 1 Post
Default

When selling a boat, the question of engine hours always is asked. I can only estimate. A good question.
Old 08-26-2015, 06:27 PM
  #12  
Admirals Club Admiral's Club Member
 
Join Date: Jul 2011
Location: South FL
Posts: 1,380
Received 49 Likes on 24 Posts
Default

I've always looked at it as 1 hour=100 miles on a car engine in terms of wear.

So, 100 hours on an outboard is about the equivalent to 10,000 miles in a car, 1,000 hours would be about 100,000 miles, and 2,000 hours would be about 200,000 miles, etc. etc.
Old 08-27-2015, 04:26 AM
  #13  
Senior MemberCaptains Club Member
 
Join Date: Sep 2006
Location: Central FL
Posts: 1,697
Received 314 Likes on 163 Posts
Default

Interesting question.

I just got back from a long trip to the Bahamas and put 95 hours on my engines over 1000nm. I had speed ranges from 7kts. all the way up to 18kts at cruise and my engines currently have around 2200 hours on them.

I know that CAT estimates engine life by the amount of fuel flowed over it's lifetime so probably hard to estimate the "total time remaining" since the fuel flow varies so much in a boat.

For example, if I were to us 50,000 gallons as a life expectancy and was burning 2 gph per engine at 7 kts that would be 25,000 hours on the engine and 175000nm. Bump that to cruise speed and I'm at 4166 hours 74988nm.
Old 08-27-2015, 04:53 AM
  #14  
Senior Member
 
Join Date: Sep 2013
Location: Lodi, NJ / Forked River, NJ
Posts: 2,946
Received 481 Likes on 217 Posts
Default

figure with all the trolling, and on plane you do, figure.... 10-15mph
divide that # by the hours
theres your miles.... a round-about area....
Old 08-27-2015, 06:39 AM
  #15  
Senior Member
 
WaterEnjoyer's Avatar
 
Join Date: Jun 2013
Location: South Jersey
Posts: 12,456
Likes: 0
Received 1,439 Likes on 691 Posts
Default

Originally Posted by k9medic View Post
Interesting question.

I just got back from a long trip to the Bahamas and put 95 hours on my engines over 1000nm. I had speed ranges from 7kts. all the way up to 18kts at cruise and my engines currently have around 2200 hours on them.

I know that CAT estimates engine life by the amount of fuel flowed over it's lifetime so probably hard to estimate the "total time remaining" since the fuel flow varies so much in a boat.

For example, if I were to us 50,000 gallons as a life expectancy and was burning 2 gph per engine at 7 kts that would be 25,000 hours on the engine and 175000nm. Bump that to cruise speed and I'm at 4166 hours 74988nm.

I have heard that is the best. You figure a small engine in a large vehicle wouldn't last as long as the same engine in a small vehicle.
Old 08-27-2015, 07:40 AM
  #16  
Senior Member
 
Join Date: Jul 2005
Location: Texas..
Posts: 6,250
Received 1,286 Likes on 687 Posts
Default

IMHO hours really don't mean anything other than service intervals. Its a function of cycle time. The more frequent the cycle time the less issues you will have..
Old 08-27-2015, 02:30 PM
  #17  
Admirals Club Admiral's Club Member
 
Join Date: Nov 2007
Location: Long Island, NY
Posts: 9,444
Received 941 Likes on 593 Posts
Default

An engine's life is most directly related to hp made as a percentage of design load and durability.
Most every automobile engine is designed to run a minimum of 200,000 miles, which is 4,000 hours at an average load of 20% of max hp - so if you have a car making 200 hp, that would be 40 hp (a modern 4 dr sedan, like a Camry uses about 15 hp to travel at 60 mph). Most boats use 50-70% of available hp to stay on plane, so life will be less.
That is why CAT, Cummins and MAN rate their engines based upon fuel used - the harder an engine is run the more fuel it uses and the shorter its lifespan.

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 Off
Pingbacks are On
Refbacks are Off


Thread Tools
Search this Thread

Contact Us - Archive - Advertising - Cookie Policy - Privacy Statement - Terms of Service - Do Not Sell My Personal Information -

Copyright © 2021 MH Sub I, LLC dba Internet Brands. All rights reserved. Use of this site indicates your consent to the Terms of Use.