115 Evinrude No Spark

[crestlinermusky]

I have a 1975 Evinrude 115 that up until sunday night ran fine.
I took it down to the launch Sunday night for a family cruise and it would not start
It was last used last friday night
When I checked for spark, I found that there was none on all four cylinders
I checked each coil for cracks or wear and theyall seem fine
How do I check the power block on the back of the motor block
What else should I check on the motor'

Mark

 

[emdsapmgr]

There is a really good ignition troubleshooting guide for your engine at this website: cdielectronics.com Better than the original factory service manual..
Once you get into the t/s guide, go to your year engine. The tests which are done when the engine is cranking are very helpful. You'll need a special "peak reading" voltmeter. A regular household voltmeter won't work. You'll want to test the timer base and the stator for sure.