Big Twin Impeller

[wbeaton]

I ordered an impeller for my 1954 Evinrude 25 hp and it doesn't fit. Everywhere I've checked says that I have the right impeller, but this one clearly will not fit over my drive shaft. Has anyone else had this problem?

The original part #375808 from my parts manual comes up as replaced by OMC 378891 or Sierra's 18-3006. Is this right or did they accidently package the wrong impeller?

 

[F_R]

Re: Big Twin Impeller

I don't have a 1954 parts book, but am fairly sure somebody gave you the wrong impeller.

 

[wbeaton]

Re: Big Twin Impeller

Thanks again F R,

Maybe its a factory error? The sealed package says Sierra 18-3006. I just don't want to order another one and have the same problem.

 

[F_R]

Re: Big Twin Impeller

Since our host here sells Sierra, I shouldn't say this. But that sounds like something Sierra would do. Is it way off or just a hair? Could be poor quality control form their (Sierra's) supplier.
18-3006 is the correct number to interchange with 378891.

 

[F_R]

Re: Big Twin Impeller

I just measured the inside diameter of a brand new genuine Evinrude 378891 impeller and it is .628" for a 5/8 (625) shaft.

 

[tashasdaddy]

Re: Big Twin Impeller

check with jim at laingsoutboards.com

 

[wbeaton]

Re: Big Twin Impeller

I've done some checking and it looks like Sierra packed an impeller for an early 10hp and all 15-18 hp motors (18-3002). Fortunately, I have one of these motors on the healing rack.

Here's a photo.

http://www.myfishingpictures.com/showphoto.php?photo=116516&size=big&password=&sort=7&thecat=500

This is the first problem I've had with Sierra so I guess that's not so bad.