Alpha One shift shaft seal

[richard99]

Greeting to all, again - <br /><br />I have a 1986 Four Winns with a Merc 140 (A590703)and Alpha One (A558018). I need to replace the shift shaft seal and after removing the old one, went to my local Mercury parts place. They handed me part number 26-816464-1. The seal is about 3/4" in diameter and about 1/4" thick, and way larger than my original (5/8 x 1/8). The guy at the desk says maybe I didn't get all of the original piece out, because these seals have always been the larger size.<br /> <br />Well, I've been in the machine trades way too long to make that mistake - I know .625 when I see it.<br /><br />This is the last thing keeping my boat out of the water. Can I get any guidance from the experts on this?<br />Again, thanks in advance to all.<br />Rich

 

[Fishermark]

Re: Alpha One shift shaft seal

If I'm not mistaken, Mercruiser did change the design of the shift shaft seal. The newer style is bigger. I recently replaced mine and I seem to remember the newer style being substantially larger.

 

[richard99]

Re: Alpha One shift shaft seal

You wouldn't perchance happen to have the wrapper (with the part number) that the new one came in, wouldja?

 

[Don S]

Re: Alpha One shift shaft seal

You need the bushing and seal kit # 26-806036A 1 which is designed for the 5/8" hole.

 

[richard99]

Re: Alpha One shift shaft seal

Thanks Don - it showed up under #23-806036A 1 rather than #26-etc. Unfortunately, it was a bushing kit for the larger (3/4") size. I will be going to the dealer with all the serial numbers I can find plus the bell housing itself to see if that will help in our part search.<br />Man, what a pain!