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Author Topic: p41 on/off switch coil wiring  (Read 639 times)

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Offline Bob

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p41 on/off switch coil wiring
« on: March 13, 2015, 09:56:29 pm »
Hi I have a p41 saw made in the 1980s I replaced the cylinder and piston, the kit came with a new flywheel and coil the instructions said they had to changed for the new cylinder,after installing them the on / off switch no longer works the saw will start with the switch in the on or off position it will not shut when you put the switch to off.
I checked the wires and they are all connected none are broken.
Not sure how to test the switch only has 1 wire going to it. When I pull the wire off the switch and ground it to the metal housing the saw shuts off. Not sure if I have something wired wrong?
Maybe someone has some ideas,a wiring diagram from an original p41.
Thank You for your help.
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Offline fossil

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Re: p41 on/off switch coil wiring
« Reply #1 on: March 13, 2015, 10:17:15 pm »
Make sure the switch is grounded to the saw case. Check that with an Ohm meter.

The switch can be tested with an Ohm meter as well. With the switch in the saw making sure the switch is grounded to the saw case, not just the handle; attach the positive or negative lead on the meter to the spade connector on the switch and the other lead on the meter to ground. With the switch on the resistance should be infinite. Switch off, resistance should be zero.
It sounds like the switch is bad or it's not grounded to the saw case.

Remember that the top handle which holds the on/off switch is electrically insulated from the saw case by the anti vibe mounts. There should be a ground wire from one of the reed block to case bolts that is also attached to the top handle. If that is not present the switch won't work.
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Offline Bob

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Re: p41 on/off switch coil wiring
« Reply #2 on: March 14, 2015, 10:16:18 am »
Thank you fossil a wire is connected to the reed block mounting bolt just like you said when I installed the new coil I connected the other end of that wire to the coil mounting screw I think the end of the wire should connect to the handle like you said.
Like a dummy I did not pay attention to where the wire was attached when I took it apart I didn't see a place on the handle where it originally attached but it had to be there, hopefully someone might have a picture.
Thanks for your expertise and response.
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Offline fossil

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Re: p41 on/off switch coil wiring
« Reply #3 on: March 16, 2015, 11:37:57 am »
If you look where my finger is pointing, the wire attaches to the underside of the top handle via this screw.
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Tim
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