lower unit seal change

[hutche]

need to do a lower unit seal replacement on a 1978 115hp johnson,i have brought the seal (part number 330137) just wondering what to expect after removing the 4 bolts,do i need to replace o rings or any other part?any little tricks or procedures to know?thanks in advance

 

[mark1961]

Re: lower unit seal change

Are you replacing all lower unit seals or is the one you have the driveshaft seal only? There is another one on the prop shaft and shift rod as well as the drain/fill plug gaskets, you really need to do the lot to do a proper job, they are available in a kit afaik. You will probably also need a water pump kit or part thereof as you will be pulling this off when you do the driveshaft seal.

 

[hutche]

Re: lower unit seal change

just the prop shaft seal as is leaking after finding fishing line around it otherwise everything else should be good

 

[mark1961]

Re: lower unit seal change

If its only the prop shaft seal which four bolts do you need to remove to get to that? Should only require prop removal unless the bearing seal carrier needs to come out as well. From what i can make out the seal/s you need should be 0321463 and there are two of them, check that the one/s you have are actually right first. There is supposed to be a thrust washer in behind the prop which may need to be checked. If the carrier does need to be removed you will need an oring for each of the four bolts 0317178 and one for the carrier 0313446. Remember to tape the splines up on the shaft before installing the new seals to protect them from damage.

 

[hutche]

Re: lower unit seal change

dont mean to sound rude as i appreciate the advice but the crowley marine website diagram stipulates part 31 id number 330137,hopefully same part but have come across other parts that have 2 different numbers from different makers,thanks for the advice

 

[mark1961]

Re: lower unit seal change

dont mean to sound rude as i appreciate the advice but the crowley marine website diagram stipulates part 31 id number 330137,hopefully same part but have come across other parts that have 2 different numbers from different makers,thanks for the advice

No sweat mate, i think you will find we are both correct.....six of one, half a dozen of the other.....the boats.net site is saying the original OEM seals (0321463) are still available for that year, usually says there superseded otherwise, just wanted you to check......

http://www.boats.net/parts/search/BRP/JOHNSON/1978/115TXL78C 1978/GEARCASE/parts.html

Carry on....