bench testing a '79 90hp mercury stator

ellis@cedarwoodco.com · #1 July 7th, 2007, 03:09 PM

Is there anyway to test a stator from a '79 inline six 90hp Mercury. I've been having intermettent spark problems and I wonder if it's the stator. I took it off and wonder if there's any way to check it. Thanks.

ellis@cedarwoodco.com · #2 July 7th, 2007, 03:47 PM

One more thing...the serial number of the engine is 5221045. Stamped on the stator is the number 2678. I've been looking around for a new one and come up with a couple different ones. Where or what is the best way/place to find which stator is the right one? thanks again.

ricksrster · #3 July 7th, 2007, 05:06 PM

CDI/Rapair is a lesser cost better replacement than Merc original. They can be found at many places. If you have the stator off the motor you can check the resistance of the windings:
Blue to ground and Blue/White to ground = 5800-7000 Ohms.
Red to ground and red/White to ground = 135-165 Ohms.
Leaving the stator on the motor yu can check DVA voltages. Blue to ground and blue/white to ground = 180V+. Red to ground and red /white to ground = 20V+.