Seal kit needed

[wyo307]

Anyone have an idea of where I can find a lower unit seal kit for a Johnson RD-15?

[crosbyman]

maybe vintage outboard.com

Joining AOMCI has priviledges 🙂

[ed-sam]

What is in a seal kit?

[crosbyman]

itis a kit to seal

Joining AOMCI has priviledges 🙂

[ed-sam]

What does the seal kit contain?

[wyo307]

It would be the prop shaft seal the drive shaft seal and the one that goes between the two halves of the lower unit.

[Anonymous]

The Sierra seal kit for 25 (an up) hp "big twins" (18-2686) is for 1956 and up,
so you’ll need to look at the parts diagram and collect the parts by number.

Typical "kits" contain (at least):
Oil seals for prop and drive shafts
Spaghetti seal
Oil fil & vent washers
Shift dog pivot pin o-ring
Shift-rod o-ring
Prop-shaft "head" o-ring

[wyo307]

With that being for a later year 1956 vs 1953-54 would it still fit? I guess the question is how much difference is there in the lower units between a RD-15 vs a RD-17?

[Mumbles]

Here’s a diagram with part numbers for your RD 15. The P/N’s may have been superseded by new ones but at least you can take them to your OMC/BRP dealer if you have to buy the seals individually. This gearcase doesn’t look much different to later ones so you can compare the P/N’s to the ones given in the link. Click on a Sierra P/N in the link and the contents of the kit will appear, sometimes.

http://www.iboats.com/Johnson-Lower-Uni … _id.271288

[chinewalker]

I don’t see why the 1956 & up kit wouldn’t work for you. Most of Sierra’s stuff has that cut off, regardless of whether the items would work in earlier motors or not. I guess they had to pick a year to arbitrarily work with and that was it.

[Author]

Posts