[fireman29]

Guys

I have a 1995 Mariah Z220 with the 5.7 350 EFI. Whats the best weight and oil to run in the boat. The boat has about 450 hours on it. Is there any other maintence I should do other than change the lower unit fluid?

[John Morgan]

Change the impeller. It needs replacement at least every two years. I do mine every year because I never want to hear the temp warning buzzer AGAIN!

[fireman29]

Originally Posted by John Morgan

Change the impeller. It needs replacement at least every two years. I do mine every year because I never want to hear the temp warning buzzer AGAIN!

How hard is it to change the impeller? Is there any instructions online you have seen for the change of it?

thanks for the reply

[Z 202]

It's not that hard. You don't state your drive type, but if it's an alpha 1 here is a good online reference:

http://www.mercstuff.com/waterpumpinst.htm

As for oil, I just run the recommended Quicksilver 25w40.