3ym30 how often to do what

[AST]

Hello everyone.
I have a Yanmar 30hp (2013) on my recently purchased boat. I have done an oil change, impeller change, transmission fluid change, fuel filter (main and racor) change, and oil change.

From this point how often should I change:
1- Oil and oil filter?
2- Transmission fluid?
3- Fuel filters?
4- Impeller? How often to check vs. change?

I see conflicting opinions on the web and thought to leverage your guys' experience here.

The engine runs great. And I m mainly motoring throughout the ICW to move the boat up north.

Thanks

[coopec43]

Surely this manual would provide that information or am I missing something?


https://j109.org/docs/yanmar_3ym-2ym-service-manual.pdf

[AST]

Exactly. The manual says oil change every 150 hrs.
But I heard from other sailers every 50 and others say every 100

[Sailmonkey]

Originally Posted by AST

Exactly. The manual says oil change every 150 hrs.
But I heard from other sailers every 50 and others say every 100

Our manual for a different engine says 250 hrs.

Guess how often I change the oil.

[LittleWing77]

Hey AST,

It's funny how much is dictated by seasons up here (in Canada). Since boats come out of the water in Oct/Nov and consequently engines are decommissioned for winter storage, often oil and filter changes are combined with the recommissioning in the Spring (or the decommissionning in the Fall). These are recreational sailboats, however, who do not put on a significant amount of engine hours seasonally.

Impellers are checked regularly by mechanics (again with seasonal de/re-commissioning), but only changed when they show wear or when the owner calls us with overheating issues!

In an ideal world, boat owners would follow the manufacturer's specs, but overall, it does tend to fall to the individual boat owner's inclination to keep up their engine maintenance (or not) as the case may be.

That's just what I've seen.

Good luck with your new boat! Wish I was motoring/sailing through the ICW right about now!

Warmly,
LittleWing77