Stihl MS362 C-M VW won't shut off

[WestCoastCanada]

Hi folks,

I just bought this used MS362 C-M VW, and it won't shut off.
I have to remove the spark plug boot to turn it off.

I checked the kill switch, there is contact between the metal in the off position.
I'm thinking next i will replace the Wiring Harness in case there is a frayed wire.

Is there anything else i am missing ? what else could cause it not to shut off ?

 

[Mad Professor]

Don't replace the harness yet. Take an ohm meter and check that the switch grounding wire has continuity to the case/cylinder. Could be bad connection or 1 bad wire.

Not sure on these newer saws if there a rat's nest of wires to deal with........

 

[WestCoastCanada]

Don't replace the harness yet. Take an ohm meter and check that the switch grounding wire has continuity to the case/cylinder. Could be bad connection or 1 bad wire.

Not sure on these newer saws if there a rat's nest of wires to deal with........

Thanks, are there any other possibilities that can cause a saw not to shut off other than something wiring harness related or kill switch related ?

 

[gary courtney]

Thanks, are there any other possibilities that can cause a saw not to shut off other than something wiring harness related or kill switch related ?

Those Stihls just want to run!

 

[ericm979]

I checked the kill switch, there is contact between the metal in the off position.

In addition to the other checks posted, check the resistance between the two sides when it's in the off position. It should be zero or nearly zero. The contacts could be dirty.

 

[pioneerguy600]

On the 362 a wire with a spade terminal connects to the module its self, another wire connects with a ring terminal located under one of the screws that holds the module to the crankcase. They both run up to the master control switch where the brass colored metal barrel mounted into the movable arm of the switch contacts the stainless flat metal spring. A wire must be connected to the stainless spring to carry the electric charge back to the coil laminations.

 

[WestCoastCanada]

On the 362 a wire with a spade terminal connects to the module its self, another wire connects with a ring terminal located under one of the screws that holds the module to the crankcase. They both run up to the master control switch where the brass colored metal barrel mounted into the movable arm of the switch contacts the stainless flat metal spring. A wire must be connected to the stainless spring to carry the electric charge back to the coil laminations.

Thanks, i will double check that...

 

[pioneerguy600]

Thanks, i will double check that...

Check the connections are tight and clean, if you can test continuity from the ends at the module to the ends of the wire at the switch. If current can make the loop around when the switch is closed it should ground out the coil, stop spark to the sparkplug. I have recently heard of a module that would not ground out, it had an open circuit inside the module.

 

[WestCoastCanada]

Check the connections are tight and clean, if you can test continuity from the ends at the module to the ends of the wire at the switch. If current can make the loop around when the switch is closed it should ground out the coil, stop spark to the sparkplug. I have recently heard of a module that would not ground out, it had an open circuit inside the module.

will do thanks for the info