Need help

[Dpennington]

I have a 2001 Mercury 90 3 cylinder that run running perfectly i started it at the house then at the boat ramp i lost all spark. I have followed all the advice i have been given and still no spark I have replaced the stator, Trigger, rectifier, all 3 coils checked the deadman switch and replaced the ignition I have no idea what else I can possibly check or change If anyone has any idea please let me know

 

[boscoe99]

Any idea as to the model of the motor?

 

[brodmann]

When you say you replaced the ignition, are you referring to the key switch? If not, I would have checked that first. How are you testing for spark? I'm not as familiar with Mercury as I am with OMC and Yamaha, but I would search the internet for a wiring diagram and see exactly where the ground wire from the ignition switch goes. I'd make sure that wire is not somehow grounded when the ignition switch is in the "on" position. Also, I'd try unplugging and plugging the main wiring harness from the control box to the outboard. That big plug. Hope you get it figured out. Sounds like you've thrown a lot of money in parts at this problem.

 

[Dpennington]

When you say you replaced the ignition, are you referring to the key switch? If not, I would have checked that first. How are you testing for spark? I'm not as familiar with Mercury as I am with OMC and Yamaha, but I would search the internet for a wiring diagram and see exactly where the ground wire from the ignition switch goes. I'd make sure that wire is not somehow grounded when the ignition switch is in the "on" position. Also, I'd try unplugging and plugging the main wiring harness from the control box to the outboard. That big plug. Hope you get it figured out. Sounds like you've thrown a lot of money in parts at this problem.

I did replace the ignition switch and i will look into the ground wire situation. Thanks for the help

 

[Dpennington]

Any idea as to the model of the motor?

The model number is 1090412ZN

2002 Outboard 90 [ELPTO] [1090412ZN] - Parts Lookup | Crowley Marine

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