Need Manual for a 1955 Johnson CD-12

jwfoster4

jwfoster4

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Apr 29, 2007
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12
Does anyone have a copy, .pdf or link for a manual for a 1955 Johnson Seahorse model CD-12. (ser #1253429) I just got it from my grandfather and he was the original owner. It is in great condition, but hasn't been run in 15 years. I am going to replace the impeller, clean it up and see how it runs. I plan to use it and would like to have the manual for proper maintenance. Especially in setting the high and low mixing screws. Any help would be appreciated.
 
tashasdaddy

tashasdaddy

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Nov 11, 2005
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51,019
Re: Need Manual for a 1955 Johnson CD-12

great little engine. i just sold a 55 15 hp. best running engine i ever had. DO NOT use starter fluid to try to start , use the premixed gas/oil spray into carb. fuel ratio is 24/1. they are easy to work on. you can make it a new engine for around $140. new coil, condenser,points, wire, plugs, impeller, carb kit. then us Joe Reeves carb settings. also when testing the engine. the legs has to be submerged 1/2 way up, as the impeller is high, and not self priming, impeller has to be below water lever.
http://www.iboats.com/bbboard/bbBoard.cgi?a=viewthread;fid=28;gtid=818798;gpid=818802
 
F

F_R

Supreme Mariner
Joined
Jul 7, 2006
Messages
28,195
Re: Need Manual for a 1955 Johnson CD-12

Replacing the impeller is not hard, but surprising in that you have to remove the powerhead to disconnect the shift rod. When the powerhead is off, you will find a spring loaded carbon seal assembly on the shaft. That seal is absolutely vital. Put a new gasket and o-ring on it. If the seal leaks, water gets into the powerhead's crankcase and it's good-by motor!

Should have mentioned that generic service manuals are also available. I assume they have them here at iboats. Also, check your local library. You might be surprised.
 
Gary H NC

Gary H NC

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Joined
Dec 1, 2005
Messages
8,972
Re: Need Manual for a 1955 Johnson CD-12

Check on ebay, Searayman13 has all the old johnson factory manuals.If he don't have it listed email him and he will find it..Much cheaper than Kencook..:D
 
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