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#355114 - 10/26/07 11:54 PM Boat engine hours Vs. Auto miles  
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KennyK Offline
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Is there any ratio that as a rule of thumb that you could relate the two?

I know that there are alot of varibles with this. But normally operated on both sides, could you say that 100 hrs. on a boat is equal to to 10,000 mile on a car? ( Just an example )


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#355119 - 10/27/07 03:04 AM Re: Boat engine hours Vs. Auto miles [Re: KennyK]  
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seabuddy Offline
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Nope, IMO.

1) Boats kinda lose alot from not being used daily. Sitting hurts a marine engine. So miles over some sort of time line, which just about varies all over the place, even for the some folks is too important to not be considered.

Personally, I would not value a boat with low hours anywhere near as highly as most other folks do.

2) Care varies greatly from owner to owner. Again, care is too big a factor to not consider. Always, always over pay for a cream puff condition that has been used well and cared for like its the only thing in the owner's life to lavish attention on.

#355126 - 10/27/07 06:58 AM Re: Boat engine hours Vs. Auto miles [Re: seabuddy]  
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tpenfield Offline
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From a pure running standpoint, I would say yes, but from a load and wear & tear, and usage standpoint, I'm with SB on this.

100 hours in a car can be equated to about 3000 - 4000 miles depending on the type of driving. You would tend to change oil every 100 hrs (crappy oil) to 200 hrs (premium oil) in a car. Synthetic oil can go even further (300 hrs).

In a boat, you would go only about 50 hours on an oil change (maybe 100 hrs with synthetic).

So, if you use oil changes as a measuring stick, then it is about a 4:1 ratio. So, 100 hours on a boat *may* be equivalent to 12,000 miles on a car from that standpoint.


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#355128 - 10/27/07 08:44 AM Re: Boat engine hours Vs. Auto miles [Re: tpenfield]  
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Keith Offline
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 Originally Posted By: tpenfield

100 hours in a car can be equated to about 3000 - 4000 miles depending on the type of driving. You would tend to change oil every 100 hrs (crappy oil) to 200 hrs (premium oil) in a car. Synthetic oil can go even further (300 hrs).

In a boat, you would go only about 50 hours on an oil change (maybe 100 hrs with synthetic).

So, if you use oil changes as a measuring stick, then it is about a 4:1 ratio. So, 100 hours on a boat *may* be equivalent to 12,000 miles on a car from that standpoint.



Lots of ways to look at this one, too many.
Using your example, (100 hours in a car can be equated to about 3000 - 4000 miles) an average speed of 30-40 mph, average annual miles on a car of say 12,000, that be 300-400 engine hours / year.
Isn't the "rule of thumb", at least in the midwest, about 50-60 hours per season on a boat?

Then I guess you would have to take into account the kind of driving the engine gets. That same 300-400 annual engine hours on a car isn't as hard on it as an annual 60 hours the boats see. Hard hole shots, watersports, and the normal cruising load on a boat engine is much more abuse than a car would see daily.
Seabuddy has a good point regarding maintenance, I think that makes a world of difference and throws another variable into the mix.
An interesting question, with many different answers?

#355133 - 10/27/07 09:01 AM Re: Boat engine hours Vs. Auto miles [Re: seabuddy]  
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Keith Offline
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 Originally Posted By: seabuddy
Nope, IMO.

1) Boats kinda lose alot from not being used daily. Sitting hurts a marine engine. So miles over some sort of time line, which just about varies all over the place, even for the some folks is too important to not be considered.

Personally, I would not value a boat with low hours anywhere near as highly as most other folks do.

2) Care varies greatly from owner to owner. Again, care is too big a factor to not consider. Always, always over pay for a cream puff condition that has been used well and cared for like its the only thing in the owner's life to lavish attention on.


I'm not disagreeing with you SB, but you got me thinking.
Let's say there are two identical 5 year old boats, both "creampuffs" and used in the same waters, one has 200 hours on it and the other has 350 hours. As a dealer, would there be a difference in "street" value? How about you as an individual, if they were the same price, which would you choose?

#355891 - 10/30/07 11:15 PM Re: Boat engine hours Vs. Auto miles [Re: Keith]  
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Indyboater Offline
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I don't think it's the number of hours used that makes a difference, it's the regularity.

Show me a boat that's sat for a year and half and not been used - no matter how many hours - and I don't want it. It'll have some kind of issue.

Show me one that sits behind a guy's house on a dock and he takes it out twice a week for 20 minutes, and it has 40 hours on it in 4 years, and I'll take it.

The problem here is that many boats sit idle for long periods of time - and ultimately, the reason a lot of people sell the "hardly used" boat is because they hardly used it.

#355914 - 10/31/07 01:08 AM Re: Boat engine hours Vs. Auto miles [Re: Indyboater]  
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trooplewis Offline
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KennyK, I think your original question , Can 100 hrs be equated with 10,000, is a good one and I think the answer is a 'qualified' yes. I think I would look at a boat with 1000 hrs on it like a car with 100,000 miles. It could last another 100,000 miles, but it could also fail tomorrow.

People tend to look at used cars on retail lots as 'all done in' if they have over 100k on the clock. We all know that many can give years of service after that point (my son drives a 130,000 mile Explorer) but that is the public's mindset.

Of course the previous owner's maintenance and care play a great deal. It also matters if most of those 1000 hours were at or near WOT, or if they were just cruising along at 40% throttle.

I also do not agree with another statement made above. I bought a boat (that was originally sold in July 2003) in Sept of 2006 with only 58 hours on it. I have had no mechanical problems or reliability issues with it.

But, for some reason the outdrive does not seem to work well in shallow, rocky rivers....

#355927 - 10/31/07 07:09 AM Re: Boat engine hours Vs. Auto miles [Re: trooplewis]  
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StarFisher Offline
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 Originally Posted By: trooplewis
But, for some reason the outdrive does not seem to work well in shallow, rocky rivers....


Actually that problem can be quite painful and expensive

Last edited by StarFisher; 10/31/07 07:13 AM.


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#355930 - 10/31/07 07:24 AM Re: Boat engine hours Vs. Auto miles [Re: Keith]  
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Keith Offline
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 Originally Posted By: Keith
 Originally Posted By: seabuddy
Nope, IMO.

1) Boats kinda lose alot from not being used daily. Sitting hurts a marine engine. So miles over some sort of time line, which just about varies all over the place, even for the some folks is too important to not be considered.

Personally, I would not value a boat with low hours anywhere near as highly as most other folks do.

2) Care varies greatly from owner to owner. Again, care is too big a factor to not consider. Always, always over pay for a cream puff condition that has been used well and cared for like its the only thing in the owner's life to lavish attention on.


I'm not disagreeing with you SB, but you got me thinking.
Let's say there are two identical 5 year old boats, both "creampuffs" and used in the same waters, one has 200 hours on it and the other has 350 hours. As a dealer, would there be a difference in "street" value? How about you as an individual, if they were the same price, which would you choose?



Ya still out there SB?

#355933 - 10/31/07 08:08 AM Re: Boat engine hours Vs. Auto miles [Re: Keith]  
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WaterMutt Offline
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Many people won't look at a boat with over 600 hours. Same people will not look at a car with over 60,000 miles. Not saying they are equivalent, just saying.

I would look at hours as being a percentage of the total you expect. IMO, the standard gas marine engine should be pretty trouble free for 800-1000 hours. I base my views on that. If the boat is sitting beside the owners hopped up Mustang or Z-28 in the driveway, and there is a NASCAR flag flying high above the garage, then I will re-consider hours.

The highest maintenance boat I ever had was also the one that got run the least.


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#355972 - 10/31/07 10:45 AM Re: Boat engine hours Vs. Auto miles [Re: WaterMutt]  
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seabuddy Offline
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I think color, shine, and the condition of the skeg would have more influence on price than two boats, alike, with 200 and 350 hours each, selling against each other.

A clean, full of original paint skeg indicates a very careful boater on shallow waterways.

Personally, I do not stop enjoying boating for my skeg "look", but as a dealer or buyer I would look at it and take it into consideration.

Look at jetjack's outdrive photos and others. It shows great care on the trailer and on the waterways.

#356048 - 10/31/07 01:59 PM Re: Boat engine hours Vs. Auto miles [Re: seabuddy]  
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Frantically Relaxing Offline
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IMO a better "equivalent" to running a boat would be an RV. Cars routinely run 75 mph at only 2200 rpm or so. But a motorhome take substantially more HP and engine rpm to keep it at 75. This *may* explain why I see so many motorhome ads stating '65,000 miles' and 'rebuilt motor' in the same sentence. But it still comes down to better maintenance = longer life.

#356166 - 10/31/07 10:56 PM Re: Boat engine hours Vs. Auto miles [Re: Frantically Relaxing]  
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KennyK Offline
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Good input so far. What I was mainly looking for was what kind of lifespan I could expect out of my new boat if maintained properly.

I have put 140 hours on it this first year that I bought it. I have gotten all of the mnfg. scheduled service done. And I will continue to have it done.

I know that I will not put as many hours per year on it in the years to come. ( newness wears off )

My use of it is split between trolling at idle RPM's and cruising at a little above on plane speed. I do open it up to WOT now and then. I don't do hardly any wakeboarding or such.


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#356171 - 10/31/07 11:30 PM Re: Boat engine hours Vs. Auto miles [Re: KennyK]  
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D-Rod Offline
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Kenny:

With that type of use, you should be able to go 1500 hours to so.

D


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#356173 - 10/31/07 11:35 PM Re: Boat engine hours Vs. Auto miles [Re: D-Rod]  
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trooplewis Offline
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I put 100 hours on my boat last year and I felt like I boated a LOT. Maybe it was more frequent trips with fewer hours of running time.... and the joy of just drifting. Of course, drifting was nicer when I could still turn on the engine and motor away...


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