Quote:
Originally Posted by ccpullin
There is a diode under the blower housing in the starter wire circuit allowing current to flow to the carburetor solenoid while engine is cranking. If the diode is bad current will flow backwards from the ignition circuit feeding the carburetor solenoid back to the starter. Being a small amount of current it will effect a relay installed, but not the starter solenoid when wired to it as factory.
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Quote:
Originally Posted by Alvy
I agree with the diode too but am concerned with 16 to 17 volts DC. Should be regulated at high 13 to low 14 ish. Could be issue with voltage regulator
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Okay, this all makes sense. Looking at the wiring diagram, I see the two diodes in the circuit and the back feed is possible/likely. When you factor in this little blurb I found, it also explains why there is no problem at low engine speeds (low voltage) and/or with the PTO engaged but the problem begins when the voltage raises too high at higher rpm with no PTO load. Or, the diode could be defective.
Allows current flow in one direction, but also can flow in the reverse direction when above breakdown voltage
Thanks for the help.