Posted by John T on October 01, 2007 at 19:54:16 from (66.244.83.147):
In Reply to: lighting and amps posted by sgtbull on October 01, 2007 at 17:54:45:
Wow, thats a difference of like 14 (+ 8 to - 6) amps when the lights are turned on, I wonder if theres a minor high resistance short in your lighting circuit??? Have the lights on and dead ground the gennys field post with the engine at fast RPM n see what happens????? If its still - discharge (and theres no minor high resistance light wiring short), I suspect the genny is weak, may well be the brushes are worn down too short or else the brush hold down spring assemblies are weak/stuck/corroded, try to clean n light lube n exercise them and/or the commutator may be all oiled or carboned over which a good clean up may cure?? If she charges better when the fields dead grounded, then I suspect a VR problem like a faulty field current control relay or carboned n burned contacts. Id put a good direct ground on the VR also n see if that helps in case it has a weak resitive ground.
While adjusting the third brush closer to the fixed may well help, Id try the above first cuz short brushes or weak springs or a dirty commutator can cause a weak charge. Also try a good clean ground on the case of the VR and the gennys case/frame also in case its resistive.
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