Life expectancy of a 4 stroke

[henryfreston]

How many hours would be acceptable before it needs a rebuild for a 40hp fuel injection 4 stroke? Just spotted a 2010 with 1,300 hours on it, seems quite a lot for such a young engine?

[Boats&Outboards]

Depends, if its been used commercially chances are its had 14 services too. If used on a leisure basis its quite a lot for an engine of that age.

www.BoatsandOutboards4Sale.co.uk

[cptsideways]

Its the equivalent of 40k on car/bike engine

[MIAMI]

Personally when I first started recreational use 6 years ago...

"100 hours" sounded like alot.

and then I became educated talking to mechanics and noticed...

"1000 hours was alot"

and after being a commercial user and speaking with daily livelihood users on a frequent basis...

"5000 hours" is alot

Law enforcement and tow operators easily put 3000 hours on a set in a year...sometimes they swap out every 1-3 years.

Difference is: They HAVE TO MAINTAIN THEM in order to extract that lifespan and its always built into their budget.

Can you do the same and extract the life out of yours?

I sincerely say that If I use it daily, I do not flush it. Occasionally, I use Salt Away to rid the cooling system of excess salt when I have forgotten to flush regularly....I know, I know cardinal sin. ..

But the 100 hours gets done and thats the simple 2 part key to keeping them running....flushing and service.

BOnus points if you use an additive to remove carbon:
Yamaha Ring Free
MErcury Quik Kleen
Berrymans
Etc

Thats the saving grace...removing carbon buildup from the motor.

This is hours of dock talk and wrench wisdom condensed into one post....

Cheers
Mike

[A1an]

A pal of mine uses a Cheetah Cat with twin Honda 120's on it for creel fishing, I was out with him last year and his engines had 3.5k hrs on them, he still has the same setup, I would hate to think what hours are on them now.

He has them serviced when due by a Honda dealer, he's never had any bother with them.

[clydeoutboards]

we see yams and honda;s with 5000 + hours them but as others have said they do get serviced as required.

[jyasaki]

Originally Posted by MIAMI

BOnus points if you use an additive to remove carbon:
Yamaha Ring Free
MErcury Quik Kleen
Berrymans
Etc

I use Ring Free on occasion (probably not as often as I should); I assume Merc Quik Clean is roughly the same; the only Berryman's I'm familiar with is the spray-on carburetor cleaner, which would be a different animal.

Are you talking about a Berryman's fuel-delivered cleaner or what?

jky