Home › Forum › Ask A Member › 1950’s Johnson Tall Boy tank. Need gasket & diaphragm
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JACQUES.
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May 30, 2026 at 4:21 pm #320382
Anyone have a gasket and diaphragm kit or a lead on a supplier? The Johnson Tall Boy 6 gallon takes a different gasket / diaphragm versus the more common low profile tank. I have a nice 55 Johnson 5 1/2 that I would like to run as a two line paired to this tank.
May 30, 2026 at 4:28 pm #320383The tank in question
May 30, 2026 at 7:57 pm #320407Tom welcome! That tall boy tank was only used a couple years. 49/50 I think, anyway your little ’55 Johnson originally came with a four gallon can. Some people switch the smaller can for the six gallon. If you can find the right material you can make your own gaskets. Maybe someone will know if a rebuild kit is available for the tall guy.
dale
Get’em wet….don’t let’m set!
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May 30, 2026 at 10:26 pm #320418I heard back from Vintage Outboards an hour ago or so and he tells me that the gasket and diaphragm are in stock and now on its way to me. Bought the cap cork also. Now on to finding quality hose and rebuild parts for the motor connection. Im really focused on running this particular motor as intended with a pressure tank. Old school for better or worse.
May 31, 2026 at 1:01 pm #320480I sell the tool to aid in replacing the o-rings in the connector. I include new o-rings with the purchase of the tool.
They are in stock.
My email and website are listed in this message body.Regards..
Richard
http://www.richardsoutboardtools.com
classicomctools@gmail.com1 user thanked author for this post.
May 31, 2026 at 2:04 pm #320486Tom,
to service your oldy download this 450 page + bible… covers all you need to keep your engine going another 50 years 🙂
download store print locally and bind in 2 books with spring cord for easy flat reading
https://www.socalaomci.com/library/johnson_service_manual_10th_edition.pdf
Joining AOMCI has priviledges 🙂
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May 31, 2026 at 7:55 pm #320514Jacques, Really appreciate the CD-12 parts catalog. Thanks! I picked up that motor from the original owner and he ever had the owners manual.
June 1, 2026 at 7:40 am #320539ever even never …just in case
here is the 1954 operator manual…pretty much the same for your 1955 version
🙂
Joining AOMCI has priviledges 🙂
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