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Discussion Starter · #1 ·
I repowered my (72) 644 with a 18hp Vanguard. The kolher K321 was a little weak and I decided to go with "More Power" and had a Vanguard on the shelf. I'm not sure I got the wiring right :crazy: . I'm not getting charge :oops: . Would any one have a wiring diagram for this application?
John in Bloomington Indiana
 

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John
Did you change ign switch? Did you wire it like a 3016 type tractor? Was there a voltage reg on Vanguard or use 644 one? Bob M
 

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Discussion Starter · #4 ·
The Vanguard was used on a 446 before I decided to use it on the 644. I bought the Vanguard threw Jim's Small Engine repair. Every thing is wired threw the relay that came with the engine. The engine starts and runs good as wired just doesn't charge.
John in Bloomington Indiana
 

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Hi John and group,
I have a Vanguard 18 on my 4018 that came from Jims Repair so I am somewhat familiar with the engine. If your Vanguard was used on a 446 as a repower there needs to be some checking into the accessories that are installed on your Vanguard. A stock 446 would have had a Case/Ingersoll tractor mounted regulator/rectifier (R/R) and the Vanguard stator output could have been connected to it which would have left the Vanguard without an engine mounted R/R or a disconnected R/R. If the Case/Ingersoll R/R was not used then the engine mounted R/R would have been used and the 12VDC+ output wire connected to the key switch. The other needed wiring changes are: the Vanguard makes spark by cranking over so it doesn't need 12 VDC+ for ignition, but it needs 12 VDC+ for the fuel shutoff solenoid for the engine to get fuel to run. The kit that I got from Jims had a relay and wire harness that was wired to the key switch to correct the ignition situation.
You need to find the stator output wires (2) and look for an engine mounted R/R.
Get your engine model #, series #, and serial # and got to the Briggs & Stratton web site and download the parts manual for your engine. You can save the parts pdf to your documents on your computer.
Bob MacGregor in CT :thumbsup:
 

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I repowered 446 with a 18 hp Vanguard from Jim's. It came with a ign switch mounted in the front just below the air cleaner, the wires were long enough,so I left it connected and used it only job was to connect power to starter and ground the engine.Easy job for a retired electricion.
 
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