1977 Evinrude 140 - Frustrating Spark Issue

ghostwave

Seaman Apprentice
Joined
Jul 17, 2012
Messages
34
Would welcome 'mostly likely' suggestions.
I have a firespitting 1977 Rude 140 on the old 19 foot Renken I inherited from my granddad (and used to fish with him on as a kid). The motor has been ridiculously reliable and fast as a scalded dog through the years but just lately quit firing on the two cylinders on the starboard side (1 and 3?). The port bank of cylinders has a nice, mean, big blue spark. I tried a replacement coil on the number one cylinder to no avail. Checked the plugs on the non-fire cylinders - new and fine. Unscrewed the cover of the power pack - no corrosion on any connections I can see. Have not checked current going to the coils yet - and reckon that's the next step - just wondered if any Rude guru might give me an obvious to look at or an easy way to test, say, the impulse from the stator to power pack to the coil and/or what voltages I should be looking for. On the upside, I went ahead and checked the compression - 120 on each cylinder. Hot damn.
Thanks for any help.
 

V153

Lieutenant Commander
Joined
Apr 16, 2011
Messages
1,764
Re: 1977 Evinrude 140 - Frustrating Spark Issue

120 a hole is impressive at that age. Sounds like a bad pack to me. Try swapping em'n see what happens?
 

boobie

Supreme Mariner
Joined
Nov 5, 2009
Messages
20,826
Re: 1977 Evinrude 140 - Frustrating Spark Issue

Try swapping the timer base wires from the good side and see what happens. If still no spark, I'd have to say a bad pack.
 

ghostwave

Seaman Apprentice
Joined
Jul 17, 2012
Messages
34
Re: 1977 Evinrude 140 - Frustrating Spark Issue

I unscrewed the cover of the ppack and "alligator clipped" a wire from the post for the number 2 coil-which was firing-and attached it to the post for #1. Turned her over and instant spark on 1. Same for 3. Ordered a new ppack which will be installed today. Will report on outcome, but I expect this will work. Thx.
 

ghostwave

Seaman Apprentice
Joined
Jul 17, 2012
Messages
34
Re: 1977 Evinrude 140 - Frustrating Spark Issue

Thanks for the advice gents. Put in the new power pack, and beautiful sparks across the plugs. Put her in the water and off we went at a high rate of speed. The kids are stoked. Shrimp baiting tomorrow nite!!
 
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