Mercruiser Alpha 1 Replacing Lower Unit

[ScAndal]

I had a un-solderable crack in my lower unit so i'm replacing it. I'm going to try to replace it myself since it looks pretty easy. <br /><br />I have 2 questions:<br />1. Are there gaskets I should replace at the same time?<br /><br />2. Is there anything I should do to clean out the upper unit while I have the lower unit off?<br /><br />Thanks,<br />ScAndal

 

[Trent]

Re: Mercruiser Alpha 1 Replacing Lower Unit

If your talking about just the lower part of the outdrive you will need the quad seal o-ring that seals the upper and lower oil gallery (starboard side). Replace the waterpump impeller also.

 

[ScAndal]

Re: Mercruiser Alpha 1 Replacing Lower Unit

Trent,<br />Do you know where I could purchase these?<br /><br />ScAndal

 

[Trent]

Re: Mercruiser Alpha 1 Replacing Lower Unit

You can order your parts at your local NAPA autoparts store. Just the quad o-ring is p/n 18-2944. Now if you order the impeller repair kits it comes with them.<br /><br />Impeller repair kit 18-3217<br /><br />Complete impeller kit 18-3320<br />These part numbers are for the Alpha 1 and MR outdrives.

 

[anesthes]

Re: Mercruiser Alpha 1 Replacing Lower Unit

Can you show us pics of your cracked lower?<br /><br />Mine was almost split in 2 peices, and we managed to weld it up just fine. Cut the worn/chipped skeg off and put a new one on while we were there<br /><br />-- Joe