Ignition question for the experts - Evinrude 70hp 1990

nphilbro

Petty Officer 1st Class
Joined
Dec 19, 2011
Messages
304
Motor has no spark. Happened all of a sudden. Checked all three coils with a tester.
Starting RPM is probably 800 - very strong so it's well above the spark threshold.

I thought it might be the kill switch so I bypassed it. Nothing.

I'm leaning toward the trigger/timer base now. I checked the resistance against the CDI troubleshooting guide. Here are my results:

Leads SPEC RESULT
Charge Coil BR/BR-YL 450-550ohm 395
Power Coil OR/OR-BK 450-550ohm 400
Trigger (timer base) WH/PU 38-42 11
WH/BL 38-42 11
WH/GR 38-42 11

I also tested the recitifier and there was no resistance. I have an extra one that tested within spec.

So in the morning I'm putting on a new timer base in hope to get spark.

Does anyone else concur? I need to have this finished by noon tomorrow for party guests planning to take the boat out.
 

nphilbro

Petty Officer 1st Class
Joined
Dec 19, 2011
Messages
304
Re: Ignition question for the experts - Evinrude 70hp 1990

Ok...on fast start models the CDI manual only says they need to be the same (11)

I just ohm'd the powerpack...it's all out of whack!
I'm going to go that route.
 
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