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I have a 1981 johnson 75hp charger. blew powerhead so i bought an evinrude powerhead that was omc identical. I have no spark. wiring issues.Thought johnson and evinrude was same wiring?

Got evinrude powerhead on boat but no spark to powerhead. everything else works( tilt/trim and access..)

Posted by jeremy lawyer on

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Bill Boyd

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Go google and type in --wiring schematics for johnson outboard motor 75 hp 1981 model --- and see if there is a pdf version for down load
repeat the search but change the name to evinrude and look for a pdf version down load
go to a dealer service center and see if you can get a schematics for each from them
while it can be expected that the wiring should be the same as each brand is made in a different factory there could be a slight difference in the wiring set up that is causing the problem

Posted on Aug 09, 2016

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Do you have the serial number of the motor? Reason I ask is twofold. Evinrude started using this model number layout as of 1980. Having said this, something is not making sense with the location of the "N" in your model number. Those last two letters as of 1980 are the year. Here is the chart. Letter on top with corresponding year below it.

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