Motors With BIG Hours

[Samnjoe]

Looking for people's experience with their outboards (or inboards) and the hours they got out of them before repower or end of life failure.
I just repowered my boat with new Yamaha 150's and 9.9 kicker. Old mains had 1800 and still ran perfect. 150 compression across the board and never replaced a part other than zincs and a couple of thermostats.
The old kicker had at least 3 times that and I only replaced a fuel pump once.

 

[Pineapple Express]

Motors are meant to run. They will often fail due to issues of aging (corrosion) rather than use.

I used to run a commercial boat that had a carb'd Yamaha F80 and the hour meter broke around 7500hrs and the motor was still going. We used that boat 4-5 days a week...lots of idling but lots of heavy running too. The motor was used for a few more years before eventually being replaced because the boat sank, not because the motor quit.

 

[noluck]

i agree with Pineapple, condensation and sitting is the hardest things on engines and seals. run them everyday and the last forever

 

[kaelc]

Got to explain this to my wife.

 

[Samnjoe]

i agree with Pineapple, condensation and sitting is the hardest things on engines and seals. run them everyday and the last forever

Yes mine were 06 but well maintained. Never moored for more than 30 days. Spent the winters on a trailer and indoors.

 

[ClintR]

Had a 2014 Yamaha 90 I bought used with around 3000 and sold with 3400hrs. Tech who ran the scan for the new owner told us both that he’d seen motors with double that amount.

 

[pescador]

F225 2003 Yamaha blew up in 2019 with 750 hours on it. I had done the exhaust corrosion kit back 2013. Everyone said it would fix it. It didn’t. It corroded thru at the T-Stat. Ran fantastic right till that last hour before she blew.

 

[Samnjoe]

F225 2003 Yamaha blew up in 2019 with 750 hours on it. I had done the exhaust corrosion kit back 2013. Everyone said it would fix it. It didn’t. It corroded thru at the T-Stat. Ran fantastic right till that last hour before she blew.

I've heard a few sad stories about those 225's.
Any Merc guys have big hours??

 

[Sharphooks]

Most fishermen say no reason to flush… most mechanics say flush flush flush… interesting disconnect going on. Change your own T - stats and internal anodes if you have them and you’ll become
a flush believer

 

[tubber]

I've heard a few sad stories about those 225's.
Any Merc guys have big hours??

Pretty sure my high hour 2003 camp return Merc 50 is a Yamaha.

 

[chille51]

3700 hours on my late 90's 4 stroke carbed Honda 75hp when I replaced it last season. Mostly previous owner's hours, came with the boat. Replaced it for peace of mind and to get some more HP and warranty coverage, not because it was giving me any problems other than a little finesse required on the choke on a cold start. Replaced with a 2024 Honda 100hp.

 

[ClintR]

Had a 2014 Yamaha 90 I bought used with around 3000 and sold with 3400. Tech who ran the scan for the new owner told us both that he’d seen motors with double that

3700 hours on my late 90's 4 stroke carbed Honda 75hp when I replaced it last season. Mostly previous owner's hours, came with the boat. Replaced it for peace of mind and to get some more HP and warranty coverage, not because it was giving me any problems other than a little finesse required on the choke on a cold start. Replaced with a 2024 Honda 100hp.

how’s the 100? I’m thinking of upgrading my 05 carbed Honda.

 

[northwest wind]

Hours are not the killer, years and salt water do more harm. I know guys that put lots of hours a year for work and they usually change the engine out at 5000-8000 hours but the engine is only 3-5 years old
They are Yamaha 90hp

 

[Aces]

I've heard a few sad stories about those 225's.
Any Merc guys have big hours??

I had 4700 on a set of twin 150 Mercs on a 26 Hourston before my last re power. This set has 1900

 

[chille51]

Had a 2014 Yamaha 90 I bought used with around 3000 and sold with 3400. Tech who ran the scan for the new owner told us both that he’d seen motors with double that

how’s the 100? I’m thinking of upgrading my 05 carbed Honda.

So far so good, knock on wood. Put 73 hours on it last season with no issues. That EFI starting is sure nice compared to the carb and choke routine. Hard to compare performance wise since it is 25 more HP and while I never did a compression test on the old one, I'm sure it was not at its peak. Definitely gets up on plane quicker, and top speed is higher. I plan to try a 4 blade prop on it next season.

 

[Samnjoe]

Any stories on larger motors? 300hp plus.