Re: Re: Re: Re: 1973 EVINRUDE 50HP

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Posted by Greg Mc ( on September 23, 2005 at 12:47:08:

In Reply to: Re: Re: Re: 1973 EVINRUDE 50HP posted by Spike on September 23, 2005 at 09:13:37:

The powerpack on these engines have separate circuits for each cylinder. I have worked on a very large number of these engines and never seen a powerpack kill spark to all cylinders at once. The two parts to suspect are the stator(charge coils) most likely, or the trigger. These are common to both cylinders. The 1973 charge coils failed usually within the first year or two but a few survived for quite a few more years. Unfortunately the charge coils are the most expensive part. (the powerpack is actually cheaper) The charge coils can only partially be checked with an ohm meter. An output test using a M-80 or S-80 neon tester or a DVA tester is required to be sure. The trigger can be tested by connecting and disconnecting a 1-1/2 volt battery across the trigger connections on the power pack while cranking the engine over. If this produces spark at the plugs then the trigger is bad. Bet on the charge coils being the culprit if they are original.

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