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Wiring help with a 1973 Toro Snowthrower

Toyota4Runner's Avatar

Join Date: Nov 2008
Posts: 4

09-12-13, 03:43 PM   #1  
Wiring help with a 1973 Toro Snowthrower


Looking for some assistance. I have an older Toro Snowthrower. I was hoping someone might be able to provide me some guidance or an image of how the wiring is supposed to be on this? There's a switch that is connected under the Escutcheon Plate. It has some wires coming from it that goto the Left and Right handles, switch that the auger lever contacts and then a cable that leads to the engine. I am not sure where this wire gets connected to on the engine. There is also a wire that is coming from the engine and unsure where that get's connected. Any help would be appreciated.

Thanks for all your help.

Snowthrower Info
Make - Toro
Model - 31763
Year - 1973
Serial Number - 3000001-3999999

Engine Info
Make - B&S
Model - 190402-0754-99
HP - 7

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aandpdan's Avatar

Join Date: Sep 2009
Posts: 481

09-12-13, 04:14 PM   #2  
Any chance you can post up a picture?

Is it electric start? How about a lighting kit?

That year engine has points. You should see a wire near the base of the carburetor on the throttle assembly attached to a stud. That's for the engine kill. A black wire should run up behind the flywheel.

Toyota4Runner's Avatar

Join Date: Nov 2008
Posts: 4

09-12-13, 05:41 PM   #3  
Hello aandpdan,

No this isn't electric start, nor does it have a lighting kit.

The black wire starts with Part1a continues with Part1b and ends at Part1c.

The other wire that comes from the handles and switch is the white one seen in the other photos. Please let me know if you require anything else to assist with this.

thank you

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PJmax's Avatar
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09-12-13, 06:32 PM   #4  
In your left handle picture the wire is grounded. That should go to one side of your keyswitch. The other wire coming from the keyswitch......the one you have labeled as going to engine.... should connect to the wire on the nylon block I have circled below.

That nylon block keeps the wire coming from the magneto insulated from ground. When you turn the key to off or stop..... the keyswitch shorts that terminal to ground stopping the spark.

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marbobj's Avatar

Join Date: May 2006
Posts: 3,658

09-13-13, 07:27 AM   #5  
On 1b, and 1c, it looks like there is only one wire coming out of the coil with a piece of one clipped. If that is the case that engine has likely been converted to a module with no points/condenser. If the small piece of wire is actually connected and ducks back under the flywheel, then you still have the points/condenser.

Either way, the black wire shown running off the coil with the nylon end casing would be the kill wire that would go through safety devices, like the auger control and maybe the drive handle and ignition switch to provide a kill for the engine. Those switches would break continuity to run the engine and establish continuity to kill it.

Then part 1a is the actual grounding point for the kill. In a nutshell 1a and 1c are the two terminals with the switches in between.

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