[AT] Ingersoll 6018

Sun Nov 29 09:03:52 PST 2020

It’s always the neutral/safety switches. Maybe someday I’ll be smart enough to start there. 😀

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On Sunday, November 29, 2020, 11:36 AM, ustonThomas Mehrkam <tmehrkam at sbcglobal.net> wrote:

 The safety switch is the weakest link in that system.  Either the switch or the connectors to the switch.
Looks like you found the problem.   

I am surprised of the poor quality of the schematic.  All it really shows is the routing of the wires. Does not really show the circuit.

    On Sunday, November 29, 2020, 9:36:08 AM CST, Bo Hinch <bohinch at gmail.com> wrote:  

 If it were me , I would make up a jumper wire with clips on each end and hook it to one wire at a time and NOT depend on a meter as you could have a broken wire with only one strand connecting and your meter will show voltage but will net carry the current necessary to make the proper contact . I would also jump the safety neutral switch just to check for its proper operation .
On Sun, Nov 29, 2020 at 8:54 AM Stephen Offiler <soffiler at gmail.com> wrote:

Continuity isn't the best test.  The light wire on the starter solenoid should have battery (+) voltage when you turn  the key minus a couple tenths of a volt lost to resistance in the system.  A good test is to check (assuming you have a decent, modern-ish digital volt meter) between the (+) battery post  and the light wire right at the solenoid.  When you turn the key, the meter will  tell  you what's being lost, and it should  be small, again, a couple  or few tenths of a volt.
SO

On Sun, Nov 29, 2020 at 12:54 AM craig.warner47346 at frontier.com <craig.warner47346 at frontier.com> wrote:

Not particularly antique but I’m having an issue with a 1993 Ingersoll 6018 with an Onan P218 engine and I’m betting there will be someone here that knows more than I do. 
I used it all day yesterday. At one point when I turned key to start, the engine didn’t turn. There was no click, no spin...nothing. I turned key again and the starter acted normal. I used it the rest of the day, stopping and starting several times. This morning, it was back to complete silence when I turned the key. Messed around a bit and decided it was the ignition switch. Bought a new one and still nothing. Since then, I’ve:
1. Jumped from large lug to large lug on solenoid. Starter and engine turned like normal.2. Checked continuity on small wire from solenoid to safety switch. It’s fine.3. Checked continuity on safety switch. It’s fine.4. Checked continuity on wire from safety switch to ignition switch. It’s fine.
I’m thinking the solenoid is bad but where I’m a little confused is on testing the small wire that plugs into the solenoid. If the ignition switch is on, should there be voltage at that wire or is it a negative circuit that is completed by turning the ignition switch?
Any help would be appreciated. I’ve attached a screenshot of the wiring diagram for reference.

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