Re: John Deere 40C starter relay installation

pcsaw · Apr 20, 2017

I'm guessing the starter is pulling more volts then it
should for some reason I've had a 12 volt in my 430
for yrs n never had to change one out

Bob · Apr 20, 2017

"So the math seems to check out, unless I'm missing something."

What you are missing is that non-lab grade Ohmmeters aren't real accurate at low Ohms, and that the current starters draw under load isn't easily determined by measuring Ohms.

Very likely, your starter draws between 100 and 250 Amps while under load, certainly a LOT more than 60.

That being said, virtually any "fender mount" starter solenoid should carry the load generated by cranking that little engine.

One thing to note, though, is that the starter on your van has an attached solenoid that does the actual switching of power to the starter.

The fender-mount solenoid only switches the current to the solenoid winding on the relay on the starter, so the solenoid you got MAY be designed for WAY less amps than an actual starter solenoid.

<img src = "http://www.rockauto.com/info/705/705_RELIANCE%20AUTOMOTIVE_61798_1.jpg">

Here's a picture of what your van starter likely looks like.

Re: John Deere 40C starter relay installation

pcsaw

Well-known Member

Bob

Well-known Member

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