Fan testing?

What you’ll want to do is check the locked rotor resistance, the locked rotor current is about 90A, so the resistance is about .16 ohms.

With this low of a resistance, you can’t measure it directly with an ohmmeter. You’ll need a 20 ohm, 20 Watt or similar resistor, you can probably get one from radio shack or other local electrical supply store.

Connect it in series with the fan to the battery, this will regulate the current to about .63A. Measure the voltage on the fan, which should be approximately 100 mV. Rotate the fan through each set of commutators, I believe there are eight or ten sets on that motor, and check each set for the correct voltage.

DId you flush out the system... I can't beleive teh sludge I got out of mine this past week. I was having problems jsut like you are now only with a stock radiator and no water wetter.

When I had the WP off I used the hose to run water through the block until it stopped coming out green... Then I ran jsut a regular water with motor flush and flushed that a couple times...

So far so good but it has only been about 300 miles and the temp has been cooler here...

Chris