Johnson Seahorse TD20

[Long Island Collector]

Hello, Thank you for your help in advance. I recently acquired an original Johnson Seahorse. After reading some posts I realize it’s pretty common model. I was told it was from the 50’s but was reading and seems TD20’s are from late 40’s? Also what would be the rough realistic value of this outboard? It appears to have compression but I have not attempted to get it running. The decal on one side is in excellent shape but the other side not that good. The serial number is 624542 and has TD20 stamped below it. Thank you.

[Buccaneer]

This page says TD-20’s were built between 1946 to 49.
http://www.marineengine.com/parts/engine-model-guides/omc-johnson-evinrude-model-number-guide/omc-johnson-evinrude-model-number-guide-00045.html
They will run at 60 to 65 psi compression, but my best
“idler” has 70 psi on both cylinders.
A ton of them made, so not worth a whole lot.
I gave a least 10 parts TD’s away the last couple of years
just to make room for other motors, lol.

Prepare to be boarded!

• This reply was modified 4 years, 5 months ago by Buccaneer.

[reivertom]

They aren’t worth a whole lot, but they are good runners and seem to last forever if treated right. They use 16/1 gas/oil ratio and many old motors have been ruined due to people not knowing and running them on 50/1 like the 60s motors. There are people selling special leather pump seals for the carburetors, and the gaskets are easy enough to make. Set up right they are good fishing motors for small johnboats, etc. I’ve seen them beat up and looking like they were dragged behind a truck and they still ran well. I used to have one that was so ugly, I called it “thief proof”, but it ran like a new motor. Around my area, they were the most numerous “grandpaw motor”. Here’s some good info on the carb. There is an address down on the page about the leather seals.
http://pochefamily.org/outboard/CarbService.html
http://pochefamily.org/outboard/

• This reply was modified 4 years, 5 months ago by reivertom.
• This reply was modified 4 years, 5 months ago by reivertom.

[powerdyn]

I believe the TD-20 S/N 624542 is a 1948

[lloyd]

Good info at the Pochefamily website, but please note that I had to raise the price for primer seals to 10 bucks several years ago

[Long Island Collector]

Thanks so much to everyone for this info.

[Author]

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