Johnson Super Sea Horse 40

[WYELKDOG]

Hello, im new to the forum and need some help!! I just was giving a johnson super sea horse 40 hp. model rdsc22 serial #2060282. They said it run 3 years ago, but didn't know much about it. Is this a 2 or 4 stroke? What year is this motor? and what do i need to do if anything before i try and start her? Any help would be great thanks!!

 

[Basher]

Re: Johnson Super Sea Horse 40

wyelkdog,

Welcome to Iboats.

You Have a 1960 Johnson 40 HP there. Use champion plugs J4C gapped at .030". It is a 2 Stroke motor run it on 24:1 fuel to oil ratio. Prior to test running the motor check for spark and compression, change the oil in the lower unit, check the oil for water or metal shavings and give the motor a once over checking all bolts and screws, if she has sat for a while you never know if someone may have tried to fix something and gave up prior to completion.

Test run the motor in a garbage can full of water, making sure that the leg is submerged at least half way but do not put it in gear stay in neutral. Make sure you have water coming out the exhaust, if not shut the engine down immediately and change the water impeller, or you may damage the motor.

Basher

 

[WYELKDOG]

Re: Johnson Super Sea Horse 40

Thank a ton basher!! That gives me a good place to start. oh what kind of compression should i be looking for on this ol' girl?

 

[Basher]

Re: Johnson Super Sea Horse 40

wyelkdog

you should be looking for around 100 psi but no problems as low as 75 psi most important is that you are within 10% on all cylinders.

Basher

 

[WYELKDOG]

Re: Johnson Super Sea Horse 40

K thanks ill check it out this weekend