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Re: I have a 1981 johnson 75hp charger. blew powerhead so...
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
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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.
I N T R O D U C E S
1 2 3 4 5 6 7 8 9 0
You have E8RLNR which breaks down as:
R= Rope start tiller steering
L= 20" shaft
N= 2nd year
R= 4th year
I would expect to see the N in the last spot:
Serial number is another way to identify the year.
This may hep point you in the right direction. Hope it helps.
first, do not use the spark plugs to test for spark. They could be fouled. (another lesson) use new plugs or a spark tester, This a HOT (powerful) ignition system so be careful. Test for spark. No then, find the black wire with the yellow tracer is the ignition kill circuit, (or it was, should still be) I would disconnect it from the ignition switch and test for spark. Do not touch this wire during or after testing, it will hurt. if you have spark, ground the wire back to the terminal to discharge. You probably have a bad key switch. more if this does not work
What you have is a bunch of parts that you need. There are very few repair shops that would consider the repair. Being an employee many years ago of such parts....Try googling, Antique motor parts/ johnson. or elaborate as OMC / Evinrude/Johnson. You can still find a parts guy that can help you (very rare) search the web and hope it turnes out Okay! BeeCee
I would try a johnson/ evinrude/ bombardier dealer for the diagram. OMC was bought out by them so they should be able to help. However in the marine industry it can be hard any literature on older products b/c they only produce a limited amount of their products.