1968 Evinrude 9.5 Hp

ryanmcc

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Joined
Jul 16, 2011
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2
Hello, I've got a problem with my outborad that is a little beyond my knowledge. I acquired the motor and it was running on one cylinder, the upper one. So I amused that I needed to replace the the coils,points, wires ect. Well before I began that adventure I wanted to see if the motor was even worth fixing, so I did a compression test and it checked out very well. Next I hooked up a spark checker to both wires and plugs. Now this is where I'm confused, first I did the top and I knew it worked and it did, next was the bottom cylinder the one I knew wasn't working, and to my surprise it did. It lit up the checker the same as the upper. I do know there is no combustion going on in the lower cylinder, I can remove the plug wire and the motor still runs when on and the plug in there is spotless. At this point I am thinking a fuel related problem, almost like that cylinder isn't getting the fuel it needs?? Any help is appreciated thanks, Ryan
 

oldcatamount

Lieutenant Commander
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Apr 4, 2010
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1,740
Re: 1968 Evinrude 9.5 Hp

Sounds to me like you have a bad plug wire. Very common on a motor of that age. Reasonably simple job to replace the wires, however, I would suggest that you replace the coils, points, and condensers while you're at it. (ps, I have a '64 9.5 Evinrude, great old motor!)
 

ryanmcc

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Joined
Jul 16, 2011
Messages
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Re: 1968 Evinrude 9.5 Hp

Ok, I wasn't gonna rule that out, but it wasn't on my radar because of the fact the spark checker lit up when both wires were tested. So I assumed it was ok, thanks.
 

Rick.

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Jul 30, 2006
Messages
3,740
Re: 1968 Evinrude 9.5 Hp

Coils, when failing , tend to do so once they get warm. This may be the reason yours gives spark. Best thing is to spark test it when it's giving you the problem. Best of luck. ( I agree with above, do all that and you should have a reliable engine) Rick.
 
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