Impeller life expectancy

[theoldwizard1]

So which is worse on an impeller. Many hours of operation or years of storage with relatively light use ?

Does Mercury have a "recommended" interval (hours or time) for changing an impeller ?

 

[dingbat]

Both are just as bad.....they get hard and take a set
I go about 3 years between changes. Some things more, sometime less. Usually change when my idle pressure goes below 3 psi

 

[MH Hawker]

my manual states 3 years or 300 hours

 

[GA_Boater]

I think sitting is worse than accumulating hours. Every time I pull out an impeller from a stored motor, the impeller is hard and brittle. Actively used motor impellers take a set, but the vanes are still flexible - They still get changed out.

 

[Scott Danforth]

its actually a time from when the rubber was molded. sitting and light use on anything is worse than daily use

3 years is the maximum duration for an installed impeller if you fired the motor or not

 

[savetexomabeaches]

I'm going on 4 years on mine. But then again, I only run the boat once a year, and only for about 15 minutes. Not sure why I have it. lol

 

[444]

I would also be looking to change mine after 3 or so years. It seems like when they are used and the rubber is made to flex they stay softer than when sitting dry.

I bought a water pressure gauge and a water temp gauge for mine to keep an eye on things.

 

[DonHof]

I went six year on my 30 hp. But it was not used much. I don't ever remember my dad or uncle ever changing water pumps on their old out boards!
They ran them like 20 years.