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1987 E40ELCUD will not do anything

I have a 1987 E40ELCUD Evinrude 40 hp motor that won't make a sound. It tried to turn over once or twice, but now it does absoluteley nothing. I have the choke on. My pumps , switches, and accessories are all working. Could the ignition or kill switch have gone bad?
 
Start with checking the FUSE on the engine.----A 20 amp fuse is in the wiring near the starter solenoid.-----The kill switch has nothing to do with the cranking.
 
well, I replaced the fuse, but as soon as I started cranking the motor, the fuse blew. I guess I will need to figure out what is causing the fuse to blow. The pumps, and everything else electrical works.
 
I meant every thing else connected to the battery works; bilge pump, etc. Last year it started fine, so I took it on a lake, and it took a while to start it, but I got it started, and it ran rough at first, but it ran fine after a while. I took it on a fishing trip, and it cranked over, but would not start. I took it to an Evinrude dealership, and they said they had it repaired, and they also winterized it since they stored it outside until they could work on it. When I tried starting it yesterday, after the fuse blew, I noticed the battery was sitting in water about 3/4 of the way to the top of it. I had the battery checked at a service station, and they told me it was ok, it just needed charged. When I charged it, it was already on 85%, but I charged it to 100%. I let everything dry out, since I thought maybe this could have caused the fuse to blow.
 
nothing else was in the water. I believe the key switch is defective, and when I got my manual out to see how to test the key switch, I realize I have the wrong manual. I believe the choke part of the key switch has gone bad, or has a damaged wire, because when I try to start the motor, I can turn the key and crank the motor, but as soon as I push the key in to use the manual choke, the fuse blows.
 
The manual I have says to seperate the 3 or 4 prong connector between the power pack, the ignition coils, and the key switch. It says to connect an ohm meter between the D terminal ( with the red lead), and ground (black lead). I should have continuity with the key switch in the off position. My motor has a 5 prong connector, and it still has a D terminal. Can I test my key switch the same way?
 
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