mercruiser making strange noises

[gomer58]

I have a 1987 wellcraft with a 165 hp 4 cylinder mercruiser with closed cooling. While engine is running in neatural you can hear a loud rubbing/howling sound ever so often, it just comes and goes. I am going to sell the boat, but would like to fix this problem first. My thought is the water pump. Any idea's?

 

[Trent]

Re: mercruiser making strange noises

Can you tell where its comming from? Like maybe the outdrive. I would supect the gimble bearing, But its hard to here from here.

 

[geriksen]

Re: mercruiser making strange noises

We need more info on this one. does the noise go away in gear? warm/ cold? Area the noise is coming from?

 

[gomer58]

Re: mercruiser making strange noises

I hear the noise right after starting. It does usually go away after it's ran for awile. It makes the noise in or out of gear.

 

[Walter]

Re: mercruiser making strange noises

Belt noise perhaps? Try removing the belts and see if the noise disappears. Of course, you don't want to run your engine very long...<br /><br />Worth a try...<br /><br />Walt

 

[arks]

Re: mercruiser making strange noises

This might be a long shot, but worth a try. Spray some WD-40 on the water pump bearing. I once had a bearing go bad on the (front mounted) pump. It made a terrible noise, and I had a hard time figuring out where it was coming from. Also, the noise went away after warming up and the seal did not leak. I changed the pump and everything was A-OK.

 

[magster65]

Re: mercruiser making strange noises

Check the easiest things first! Spray a little shot of WD-40 on the pulleys/belt(s). I've heard some unusual sounds come from noisy belts.

 

[beckerdg]

Re: mercruiser making strange noises

The following link may be similar to your problem.<br /><br /> http://www.sterndrives.com/wwwboard/messages/6076.html

 

[Trevor]

Re: mercruiser making strange noises

sounds like your gimbal bearing try greasing the grease nipple that is on the starboard side of the transomplate the noise should go away for a while but will return in an un known amount of time. Good luck

 

[gomer58]

Re: mercruiser making strange noises

I think I will try the WD-40 trick, it seems to be coming more from the front than any where else.