Impeller problems.

[raytom]

Ok Guys, Last year I put the boat away with a impeller problem. I think I have a blockage. I burned a impeller last so I replaced it and took the boat out and burned another. The thing is that when I took the impeller out it had fins that were facing the wrong way. I know I put it in with them all in the right direction. I did run it on muffs at home and it worked fine. I checked it out after I ran it to see if there were any fins pointing in the wrong direction. There were none. Then I took the boat out and ran it at a good speed for about 20 mins and started to over heat. Whan I took it apart some fins on the impellar were in the wrong direction. Would a blockage couse pressure to build and move the fins or is it some thing eles. What common places may block up in a 88 4.3 omc cobra.
Any help is appreciated, Ray

 

[Haut Medoc]

Re: Impeller problems.

I'm am not an OMC guy, but are you sure you are putting them in the right direction?
On a Merc. Alpha Gen one they will right themselves as soon as the engine is started......
On an OMC, that might not be the case, they might want to stay put & don't as they start to fail......
You need to be sure of the rotation......
I'm sure someone will be along that knows way more than me on OMC stufff......​

 

[raytom]

Re: Impeller problems.

What way should the fins be directed? I did replace just as it came out. I have cleaned out the power steering cooler. Any other ideas?

 

[Haut Medoc]

Re: Impeller problems.

I'm sorry, I am not an OMC guy, try adding "OMC" to your thread header to get the OMC guys answers......​

 

[Boatin Bob]

Re: Impeller problems.

Holding the housing in your left hand you should be turning the impeller clockwise as you put it into the housing, when it's in the blades will have a curl to the left or counter clockwise.

 

[raytom]

Re: Impeller problems.

ok thats the way it was in. When Ipulled it out all but like three of them were curled the other direction. Any ideas?

 

[smithrock]

Re: Impeller problems.

Are you using the right impeller?

 

[raytom]

Re: Impeller problems.

yup.