1983 John Deere motor swap

[Guzzigary777]

The 11 hp B&S in my John Deere 111 has given up the ghost. I found a 12.5 hp B&S motor (almost identical) to replace it. Once installed, I changed the valve breather from the old motor onto the new one to accommodate the fuel pump. Now I notice the plug ins for the stator and regulator are different on the new motor. PLUS i CAN'T EVEN FIND THE REGULATOR on the old motor. Does anyone know what I need to make this work?

 

[ILENGINE]

If you would post the model number info for both the old and new engines, it would be easier to see what needs to be converted.

 

[Cannon51]

The 111's I have use a diode in the wire between the stater connector on the engine and the solenoid. I repowered one of mine with a 12 hp that had a 2 wire stater with a diode in the engine wiring. Does your 12.5 engine has a regulator or a diode in one of the wires. If it has a diode, make a wire to run that wire straight to the battery side of the solenoid. I don't remember seeing any 12.5 flathead engines with regulators but if it has one the DC out would go to the same post on the solenoid. I don't think it would hurt anything to keep both diodes (one on each side of the connector) in the line but the one on my tractor was bad.
Cannon

 

[Cannon51]

Maybe a wiring diagram.