[1Brewer]

Sorry if this has been covered, but local boat dealer I purchased winterizing supplies from today asked me about impeller; this boat is new to me this summer, and I have never changed an impeller on any other I/O mercruiser before. Googled it, and saw anything from "every 100 hours" *gen 1* to "its a lifetime impeller". *gen 2*. Any other 2006 SX 21 owners out there know about this? Thanks!

[Firestone]

I was told to change my gen 1 every 2 years just to be safe.

[1Brewer]

How do I know if it's a gen 1 or gen 2?

[Car1379]

I believe gen 2 came out in 92. Any one correct me if im wrong but thats what i know and also the earlier gen 2 trim lift cylinders i bought as spares are not drilled for an anode.