Chrysler 555HG wont stop running.

[Chuck 563]

I have a Chrysler 55hp that continues to run when I turn the ignition switch off. Per SELOC service manual this is a type 1 Ignition system (Flywheel Magneto). I installed new ignition sw. MP41000 Ignition Switch (Three Position - Push to Choke), I wired it per the wireing diagram on page A-41.

(C) Choke (Green)
(M) Ignition Stop or Tach. (White)
(B) Battery (RED)
(M) Ground (Blue)
(S) Start Solenoid (Yellow)
(I) Ignition (One side of Overheat Warning Device)

* Black Wire connected to nothing at switch end.
Orange Wire connected to One side of Overheat Warning Device.
Purple Wire No connections either end.
What did I do wrong and how do I correct the problem?

In reality at the motor end, the Black wire is comming from the Magneto.

 

[Frank Acampora]

Re: Chrysler 555HG wont stop running.

Just to double check: You do have magneto ignition? There are no coils on the side of the engine or no CD box located on it?

Disconnect the black from the magneto wire.

Coming from under the flywheel should be two brown or black wires. They have larger flat terminals on them and may be a pair looking like lamp cord. These wires ground the points to each other when the switch is turned off. SO: One wire should connect to the white terminal and one should connect to the blue terminal on the engine then both white and blue wires should connect to the "M" terminals at the switch.

When the switch is on, the "M" terminals are isolated and the points function normally. When the switch is off, the "M" terminals are in continuity and the two points short through each other. (two cylinder engine, two sets of points--one set is open while the other is closed and grounded)

Proper wiring for the magneto engine has the black wire connected to ground at the engine end but not used at the dash--unless you need a ground for something else. purple is not used on magneto engines. It is used for tach on electronic ignition engines. You have green, red, and yellow wired correctly.

"I" terminal is a switched 12 volt source. It is used to power anything that should be on only when the engine is running--like overheat indicator or engine gauges. Overheat indicator switch on engine is open until hot then it grounds. So, when it grounds, voltage goes from "I" terminal through overheat indicator (light or buzzer) to ground. To test indicator, with the ignition switch on, short the terminal on the engine to ground. Buzzer should buzz or lamp should light.

If the engine still does not stop, then you need to remove the flywheel and be sure that both point sets have a "ground" or stop wire connected where the capacitors connect, and that both wires are not broken

I have not used one but I hear it all the time: Seloc manual is crap. Incomplete and confusing.

 

[Chuck 563]

Re: Chrysler 555HG wont stop running.

Thanks, I checked the wiring on the motor and they were wired that way, I apparently looked at the wrong wires before. I cleaned the spade lugs just in case there was too much oxidation for good contact. I will clean the lugs on the switch end tomorrow and try it once more. I will let you know the results then.

You gave me an excellent explanation of how the internal switch operates, which cleared up much confusion in my mind. Thanks again

 

[Chuck 563]

Re: Chrysler 555HG wont stop running.

Frank, Thanks again for your answer, I pulled the switch out and rechecked the connections. I had the Overheat Sounder and the Blue wires reversed. When I corrected my dumb mistake, everything works great. It starts and stops great, with ignition on and grounding the temp. sensor the alarm works also. I am now ready to go fishing.

Thanks