140 alpha impeller replacement

[mountainmariner]

Hey All,
I have an 1986 Sylvann, 18' bowrider with a 140 alpha.
I had some overheating issues last season, and believe it to be the impeller. We ran the boat without muffs for about 10 minutes, and started hearing a rattling noise around the back of the boat. We took the boat out several times after that, and it kept getting warmer, and warmer.
So, does anyone have any "step by step" guides, or pictures of how to do this?
All help is apprecciated!
btw, NEVER run your boat without muffs!!!

 

[ziggy]

Re: 140 alpha impeller replacement

go to the adults only sticky. get service manual #6 for your drive. in it will be the step by step instructions for the repair your doing..

and your right. don't run w/o water to the impeller. check this out..
http://www.boatfix.com/merc/Bullet/87/87_14.pdf

 

[mountainmariner]

Re: 140 alpha impeller replacement

yup, that's probably what I'm lookin' at!
Thanks for the response, and help!

 

[Bondo]

Re: 140 alpha impeller replacement

We ran the boat without muffs for about 10 minutes, and started hearing a rattling noise around the back of the boat.

Ayuh,...

I'd Bet that you Burnt up the exhaust Flapper,+ the Rubber connector tubes too...
The Noise was the flapper....

 

[mountainmariner]

Re: 140 alpha impeller replacement

Great! I knew it wouldn't be easy. Any idea on cost/time for this? I have tools, and a garage, just need to clear it with the "boss", and she ain't gonna be happy