Need help 1970's Evinrude 90hp " No fire on all plugs "

[Hammer6950]

Hey guys, I'm getting no fire on all 4 plugs on my older model 90hp Evinrude. Assuming that all 4 coil packs & both power packs are good & have not went out at the same time, what should I check next ? I have a strong battery, & the motor is turning very well. The motor was running fine 6 months ago. Any help would be greatly appreciated! Thank you!

 

[racerone]

By the cowling it looks to be an 81 model.----Some will argue.-----Charge battery.----Load test battery.----Take starter apart and inspect.----Do ohm check on armature.------If ohms check good the assemble and test for spark.----No coins spent doing this investigation.

 

[Hammer6950]

By the cowling it looks to be an 81 model.----Some will argue.-----Charge battery.----Load test battery.----Take starter apart and inspect.----Do ohm check on armature.------If ohms check good the assemble and test for spark.----No coins spent doing this investigation.

Okay, thank you so much. I will do this and respond as soon as possible!

 

[oldboat1]

Can try jumping from your vehicle. Pos to lug on starter, neg to mount. May not be spinning fast enough.

 

[tphoyt]

Do you have a safety lanyard? If so check wiring to be sure its working properly and not grounding out your spark.

 

[Hammer6950]

By the cowling it looks to be an 81 model.----Some will argue.-----Charge battery.----Load test battery.----Take starter apart and inspect.----Do ohm check on armature.------If ohms check good the assemble and test for spark.----No coins spent doing this investigation.

I took the starter off, everything looks good. Flywheel is spinning very fast, but still no spark. Thanks.

 

[Hammer6950]

Do you have a safety lanyard? If so check wiring to be sure its working properly and not grounding out your spark.

I do have a safety lanyard. Safety kill switch looks good & seems to be working properly. Wiring also looks great. Thanks.

 

[Hammer6950]

Can try jumping from your vehicle. Pos to lug on starter, neg to mount. May not be spinning fast enough.

Flywheel is spinning very fast. I tried this maneuver, but still no spark. Thanks.

 

[tphoyt]

I do have a safety lanyard. Safety kill switch looks good & seems to be working properly. Wiring also looks great. Thanks.

I’m not try to be a wise guy here but seems to be working doesn’t tell much of a story. Did you test the switch and wiring with an ohm meter to be sure it is working?

 

[racerone]

Just replace the stator and timer base.----These are the only parts that could be the issue here.

 

[ct1762@gmail.com]

or just get a $25 ebay DVA adapter and test output for the charge coil and timer base black/white wires.