85 evinrude 75hp please help.

[Treeguy4420]

85 evinrude 75hp, only starts when it wants to. It doesn't get fire to any of the cylinders. But one day it might start every time I hit the key, and when it starts it runs great. The next day won't hit a lick. I've replaced the ignition switch, stator, cdi box, rectifier. I checked all the grounds and I can't find any obvious bad wires. Any idea what the problem is would be greatly appreciated.

 

[racerone]

Charge the battery and have it load tested.-----Take starter apart for inspection and ohm test on armature.----No $$$ spent to do that.---Have to ask.-----You are pushing the key in and holding it in while cranking ?

 

[Treeguy4420]

The engine cranks over, just no fire at any of the coils

 

[racerone]

Good luck sorting it out.----Likely something simple then.

 

[Treeguy4420]

It's like it has a mind of its own. ( I think I'll run today. Or I don't want to go fishing today so I'm not going to start.) Lol

 

[saltchuckmatt]

It's like it has a mind of its own. ( I think I'll run today. Or I don't want to go fishing today so I'm not going to start.) Lol

There is a reason they name boats after women!!!

I'm thinking short somewhere....wires under flywheel maybe. Short or corrosion, something along those lines.

Keep looking.

 

[flyingscott]

Look at the deadmans switch.

 

[oldboat1]

two wires to short ignition in the "off" position typically run to a coil mount (one wire) and to the power pack (second wire). Best to find a factory manual to trace the wiring. If the ignition is shorted (by intention or not), the motor will not fire.