water pump "key"

[medic2051]

currently replacing water pump on '75 johnson 50hp. Trying to slide new impellar down over moon shaped key on drive shaft. How hard should i have to push down on the impellar? It seems like I'm using an awful lot of force, and it won't go down. Curve of key facing center of shaft. Do I need to lube the key/impellar? any help appreciated.

 

[rickdb1boat]

Re: water pump "key"

I really don't know on yours, but on both my OMC's it slid down nice and easy. Snug, but easy. Correct key I hope???<br /><br />Just re-read post. Flat area goes to shaft with sharp leading edge of key toward direction of rotation.

 

[medic2051]

Re: water pump "key"

got it on. thanks