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How many hours can you put on a 4-stroke?

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How many hours can you put on a 4-stroke?

Old 05-25-2020, 06:46 AM
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Default How many hours can you put on a 4-stroke?

Yamaha, suzuki? I’m looking at used boats and wondering how soon I would have to repower. Figure some people on here will have reasons they’ve repowered or prices of how much repairs over the years. I know every 100 hours is the general service but what else?
Old 05-25-2020, 03:14 PM
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I have settled on 10 years, 3000 hours as being when you can still sell it running and not be spending a lot of money on it based on my Merc 60 EFI. I have 1700+ on my F-70 and not a lot of money in it. Just the regular maintenance. Nothing that wasn't scheduled and a lot of things that were "inspect" were just that.
You can find the owner book for the motor you are looking at on the web and see what the scheduled items are
Old 05-25-2020, 03:16 PM
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Commercial operators will be running motors way up in the thousands of hours. The pontoon tour boat operators has a few Suzuki 175s that are 6000-7000 hour motors still in service.
Old 05-25-2020, 03:16 PM
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I have heard stories of Yamaha F150s going over 4000 hours without any major troubles. I bought a pair of them so I’m hoping they live up to that.
Old 05-25-2020, 06:04 PM
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F250 with 3900+ hrs and still going strong!
Old 05-25-2020, 06:15 PM
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You can put up to 24hrs on a 4-stroke per day.

Corrosion and years of exposure to weathering is what kills motors more than any certain number of hours.
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Old 05-25-2020, 06:41 PM
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Originally Posted by Captaindoug View Post
Yamaha, suzuki? I’m looking at used boats and wondering how soon I would have to repower. Figure some people on here will have reasons they’ve repowered or prices of how much repairs over the years. I know every 100 hours is the general service but what else?

You’ve got 2 clocks if it’s a salt water engine. The wear clock & the marine environment clock. The guys who are getting 3000+ hours are most likely commercial operators or at least year round recreational operators who are putting on a lot more then 100-150 hours a year.

If your a 100 hour a year saltwater guy , with the engine sitting unused for months, chances are something corrosion related is gonna kill that engine LONG before the engine is worn from running.

You get to 15 years with a saltwater 4 stroke, regardless of hours, you’re running on borrowed time.


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