how often to change impeller on 5L Alpha drive

[derekf]

I've seen everything from annually to every 300 hours.

Of course everything I can find on the subject is from bravo drive guys, and they don't have to do much beyond remove a belt and pull the pump/pulley together. As an alpha owner, it looks like I have to take the whole gear housing apart to get at it.

Does anyone know where I can get ahold of a step-by-step impeller replacement guide for the alpha's

Thanks!

 

[Quint4]

Check this link out

http://www.sterndrives.com/mercruiserhelp.html

 

[Sundancer]

Annually to 300 hours covers all bases! If you boat in freshwater and put 300 hours on it in one year, change it. If you boat 40 hours a year, but spend a lot of time in shallow sandy areas, change it annually. I boat in freshwater lakes and I change mine ever other year. We do about 40 to 60 hours a year and it looks very good at the end of the second year. I could probably go a third, but it's not worth the risk or hassle of being out of service.