Impeller Change

[TDJ2591]

I was asked this question but did not know the correct answer.

In general, at what point should the impeller be changed? I realize that water condition (dirty, shallow sandy, salt, ec.) might affect its life. Is there a rule of thumb based on perhaps hours, passage of time, etc.? I recall a factory motor rep at a boat show saying to change it every other year but wouldn't it depend on usage?

I had mine changed last year as I had no idea if the PO had ever changed it. It needed chamging as the blades had all taken a curved set and it was starting to deteriorate (resembled dry rot cracking).

[PlaynDoc]

"someone" once said... every 100 hours, or every two years

[mpilot]

New mercury four stroke manual recommends checking every 300 hours or three years. If your are going to the effort to check it might as well replace it.

[Bamaman]

It all depends on the quality of the water and the hours the motor's used. My Yamaha impellers seem to last longer than others.

I'm on a deep rock bottom lake with good quality water, and I've not changed them that often in the past--maybe every 5 years. But my impeller only costs $28 and I can do the job myself. I see no reason to get the whole kit since I'm careful removing the gaskets and parts.

I really need to change the impeller more often. When I get to 100 hours, I might have 7-8 years on the motor.

[ROLAND]

I've had mine changed out every 3 years.. just had it done this past off season.

[MH Hawker]

same here ever 3 years

[badmoonrising]

I concur, every 3 years. My 2013 Merc is due end of season.