70's 9.5 evinrude

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grady2009

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I have a 75 evinrude 9.5 The problem... Will not run with both plugs and wires on ... will only run with lower plug and wire removed and upper on there is spark from both wires . is this a reed valve problem or what thanks
 
iwombat

iwombat

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Re: 70's 9.5 evinrude

Not a reed problem - an ignition timing problem. Sounds like your flywheel may have shorn off the key.

Pull the flywheel and inspect.
 
F

F_R

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Re: 70's 9.5 evinrude

If it truly is a 1975 as you say, the it is a 9.9hp, not a 9.5. Totally different animals. The 9.9 has the "Low Tension Magneto" while the 9.5 had the good old "Universal Magneto".

There, now that I've told you all I know about this particular problem, I have to say I've never heard of such a thing. I'm guessing one set of points is way out of adjustment. Just a WAG.

It isn't reeds.

Let us know what you find.
 
iwombat

iwombat

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Re: 70's 9.5 evinrude

I looked right past the 75 part of that post . . .

If it's a 9.5
I'm thinking either the flywheel really slipped and it's just barely chugging along on one cylinder way out of time. Or, there's a wiring issue under the flywheel. Or, like FR says point gap is gonzo.


I'm not familiar enough with the early 9.9s to make a call.
 
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grady2009

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Re: 70's 9.5 evinrude

The motor is a 9.5 and is in the 70's I ran the numbers on iboats for parts said it was a 75' 9.5 ... engine cover said 9.5 so dont know for sure just asking a question ....
 
iwombat

iwombat

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Re: 70's 9.5 evinrude

Last year of the 9.5 was '73 (ok now I'm second guessing myself and thinking '74 - hate when that happens). Anyway, there certainly weren't any made in 1975.

But, your problem is in the ignition for sure.
 
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grady2009

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Re: 70's 9.5 evinrude

Opps posted too fast . Finish thread... this has been baffeling me for awile I may just junk the motor if it needs too much work Thanks guys 4 info
 
iwombat

iwombat

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Re: 70's 9.5 evinrude

The only thing that could take a lot of time and effort with this particular problem would be if you sheered the key enough to mess up the key slot in the crankshaft. Everything else is a pretty easy fix.
 
billy4hp

billy4hp

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Re: 70's 9.5 evinrude

iwombat said:
Last year of the 9.5 was '73 (ok now I'm second guessing myself and thinking '74 - hate when that happens). Anyway, there certainly weren't any made in 1975.

But, your problem is in the ignition for sure.
Click to expand...

Since I recently aquired a 1972 9 1/2, I have been gathering quite a bit of info as I am in the middle of "restoring" the little guy....

From what I can truely find the last year of the 9 1/2 was 1973, the 9.9 came about in 1974....
 
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