Topic: 1937 Thor lower unit seals – Antique Outboard Motor Club,Inc

This topic has 9 replies, 4 voices, and was last updated 1 month ago by Mumbles.

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March 25, 2024 at 9:37 am #286226
Brian Grigsby
Participant
I have a 1937 Thor (Sea King ) 2.4hp. The lower unit was seized. I removed lower and got the prop shaft un stuck. I seen a post from years ago where Mumbles sourced some sort of seal for his. Does anybody have any thoughts on a replacement seal of some sort? This will only be ran rarely, then drained to let all the water out. Thanks for any input. Brian.
March 25, 2024 at 9:41 am #286227
Buccaneer
Participant
US Member
In case anyone needed a refresher on what those gear cases looks like,
here’s mine when I opened it up.
I don’t believe I put any kind of replacement seal in it, but not sure.

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March 25, 2024 at 9:47 am #286230
Buccaneer
Participant
US Member
Hopefully I found something new to put in mine…. looks like they just
had a “rubber band” of sorts for a seal.

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March 25, 2024 at 9:51 am #286232
Buccaneer
Participant
US Member
Founds some notes on mine……..

Lower Unit – gears and bushings okay. Replaced
two old cork seals with leather.

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March 25, 2024 at 12:05 pm #286234
Brian Grigsby
Participant
Thanks Buccaneer. So to be clear on the round seals were created with leather? Mine were so deteriorated they crumbled and fell out in pieces.
March 25, 2024 at 5:15 pm #286236
Buccaneer
Participant
US Member
Brian Grigsby wrote:

Thanks Buccaneer. So to be clear on the round seals were created with leather? Mine were so deteriorated they crumbled and fell out in pieces.

That’s what I wrote in my notes six years ago,
and that’s all I know!

Prepare to be boarded!
March 25, 2024 at 7:21 pm #286244
jeff-register
Participant
US Member - 2 Years
Just guessing but they look like a slice of hose if you could match something & use sealer of some kind. I used gas hose to center wiring in a 3/4″ flexable conduit. Look at hoses at NAPA or Home Dept for starters maybe.
March 28, 2024 at 3:06 am #286327
Mumbles
Participant
Brian Grigsby wrote:

I have a 1937 Thor (Sea King ) 2.4hp. The lower unit was seized. I removed lower and got the prop shaft un stuck. I seen a post from years ago where Mumbles sourced some sort of seal for his. Does anybody have any thoughts on a replacement seal of some sort? This will only be ran rarely, then drained to let all the water out. Thanks for any input. Brian.

Wow, that’s going back a few years!

I spent way too much time on that motor and still haven’t had it running yet. The rotted out gas tank needs some love as does the mag. It has new bushings on the crank and in the gearcase along with a new shafts, water pump cam and follower, along with other parts. Guess it should go back on the ‘To Do’ list.

I did find SKF seals for my Evinrude Sportsman and Sportwin motors but I think I used whatever I had on hand for the Thor (Seaking) and made an aluminum adapter for the prop shaft seal. Can’t say for sure but I think I bored out the driveshaft bushing I made to take a lip seal. No notes or part numbers on hand. Sorry about that.
March 28, 2024 at 3:15 am #286330
Mumbles
Participant
Not sure how two of those photos appeared but I’ll try to post the proper ones.
March 28, 2024 at 3:19 am #286331
Mumbles
Participant
I give up.

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