1990 Evinrude VRO 70HP Igition

I have a 1990 70 HP Evinrude VRO.

In my last post about this engine I had a bad rectifier which I replaced with a new which resolved part of my eginition issues.

I have one more question about the role of the rectifier.
I noticed then when the rectifier was not connected the strengh of the sparks coming from the spark plugs was very strong.
Sparks were more then 1/4 inches in length however when I connected the rectifier following the proper wiring diagram, the sparks coming out
from the plugs were not as strong and were less then 1/4 inches.

Does someone know why that is?

BTW this difference sparks with the rectifier connected, makes the engine more difficult to start when cold in comparision to not having the rectifier
connected.

Thanks in advance for your suggestions.

Re: 1990 Evinrude VRO 70HP Igition

You may have a stator problem. Charge and ignition should be two separate circuits in the stator.

Re: 1990 Evinrude VRO 70HP Igition

The rectifier is wired to the stator to charge your battery. The stator also produces current for your ignition. Two different systems. A wild guess, you may have stator probs. That mtr should jump a 7/16 " open air gap on a spark tester, not just 1/4 ".

Re: 1990 Evinrude VRO 70HP Igition

Good day Haffiman and Boobie;

Thank you very much for your reply its much appreciated.

If I wanted to do the repairs myself, do you know good manuals or how to books that shows how to get to the Stater?
From my very basic understanding of the iginition system on this engine, the stator is positioned under the fly wheel.

I suspect that when you try to remove the flywheel, you have to be extra careful not to mess up the other sensitive iginition components
installed underneath there.

Thanks again for your suggestions.

Re: 1990 Evinrude VRO 70HP Igition

Buy an OEM factory service manual. NOT Seloc or Clymer.