1970 25 evinrude

[Eyeballsdeep]

Just got this 1970 evinrude off someone that needs it running in the spring
I rolled it over with the plugs in and she has great compression. Unfortunately the top cylinder has no spark.
Here's the flywheel off and the abortion of a puller I slapped together. It worked! What a surprise.
The coils look good and the points are clean but I'll run a thin file through them to be sure. And as always, Murphy struck again, and the cold has drained the battery on my multi meter. Oh well, I'll be back in a bit to give you guys the results of the test.

 

[F_R]

Re: 1970 25 evinrude

Nice picture. Nice enough that the points don't look all that clean. Looks like they are oily. Maybe it looks better up close and personal

 

[nwcove]

Re: 1970 25 evinrude

maybe its an optical dillusion.....but in the third pic....is the flywheel key sheered?

 

[Eyeballsdeep]

Re: 1970 25 evinrude

No the key is not sheared. Those are a few metal fillings from drilling out the bolt holes on the puller I made. I blew everything off, And nothing is oily it's just clean and corrosion free. Any idea what resistance I should be looking at on these coils? I'll just measure the one that has spark and compare. I think it's most likely the condenser.

 

[F_R]

Re: 1970 25 evinrude

Around an ohm on the primary and a few k-ohms on the secondary. Not all coils are created equal, so don't expect to find a certain exact resistance.

 

[Eyeballsdeep]

Re: 1970 25 evinrude

Seems there are a few more minor problems, plug wires are extremely stiff so it's realy hard to throttle up, and the tiller was loose (missing bolts) both coils are about an ohm 1 on the primary and .0025 on the lower secondary and .0018 on the upper secondary.

 

[Eyeballsdeep]

Re: 1970 25 evinrude

Seems there are a few more minor problems, plug wires are extremely stiff so it's realy hard to throttle up, and the tiller was loose (missing bolts) both coils are about an ohm 1 on the primary and .0025 on the lower secondary and .0018 on the upper secondary. And the recoil spring is a little rusty. I just sprayed some fluid film on it and sticky problem solved. I'm pretty sure this thing hasn't been lubed since it was built. So all I need to fix this up is new silicone plug wires, a few new condensers and point adjustment, adjust throttle linkage, replace lwr unit gear oil. Hopefully that's it. Fingers are crossed!