Ingersoll 185 starts, but wont stay running

by Lee Gentile
(Norfolk, Massachusetts)

Compressor starts fine, and will run as long as you hold key switch in start position.

As soon as you let key switch return to to on position, it loses power to the fuel pump.

Have jumped power directly to fuel pump, and will run fine then.

Is there a solenoid or switch somewhere that could go bad, and cause the machine to lose power to pump when switch is in on position?

Just put in new switch, and double checked power out when in on position, and there is power going out.

Comments for Ingersoll 185 starts, but wont stay running

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Mar 12, 2018
Randy's response to IR 185 won't stay running
by: Doug in

Thanks for that.

Makes me wonder if it was really the battery, or a bad connection to it, an alternator problem, or a solenoid problem, though.

Anyway, I hope you'll let us know if you have further similar trouble, and the fix.

Mar 12, 2018
Air compressor starts but shuts off
by: Randy


So I called a mobile equipment mechanic for mine and it ended up being the battery. Had enough power to start it but apparantly affecting the shut off solenoid. He put a big heavy equipment battery in and seems to be working now. The one he replaced was an interstate.

Mar 10, 2018
185 compressor won't stay running
by: Edward

Starts but won’t stay running when I let go the switch

Jan 05, 2018
185 shutting off
by: Anonymous

I am having the same problem. I haven't yet figured it out. But I am going to try a new key switch and then the shut off solenoid.

Oct 24, 2016
Check your safeties
by: Anonymous

I had the same problem on my 1995 Ingersoll-Rand 185. The problem was that the over temp sensor on the screw head somehow become disconnected. The problem you are having sounds like mine, and that is one of the safeties is kicking on preventing the machine from running any longer double check all of your safety sensors connections.

Oct 20, 2016
@ Same issue by: Anonymous
by: Doug in

See below.

I haven't found one online (at least w/o signing up at some dubious websites), so if you really need one, you'll probably have to buy one from I-R.

Sep 25, 2016
Same issue
by: Anonymous

Where can I get a schematic of this unit. I have the same issue. It will start, but as soon as I let the switch spring back to the "run" position, the engine stops.

Mar 13, 2016
by: Doug in

The power is leaving the switch? but not getting to the pump?

That says the wire is broken somewhere.

If you can't easily trace it to find the fault, you can just run a new one. It's possible the old one could short at the fault, so disconnect the original (and tag it) too.

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