[Capt. Debbie]

Got decades on mine is all salt water. If it aint broke don't fix it. But mine are all Mercury and 25hp and less.

Originally Posted by bulletbob

A friend of mine worked on outboards at a repair shop.. he thought it was ridiculous and wasteful to replace a perfectly good pliable impeller every year or two.. I tend to agree, but to each his own.. You guys are usually in salt water, lots of sand, shell, etc, so i am probably jaded.. A pump up here in deep clear water lakes lasts practically forever... I always have old decrepit outboards anyway, so mine get replaced when they stop pumping properly.. I would think differently I suppose if I had 2 $20,000 outboards hanging on the transom.

Every 2-3 years under normal usage unless you tend to suck crap off the bottom a lot in your dock/launch area, and then every year is probably a better idea... bob