Hey there, generyac, welcome aboard! Do you think that he should try field flashing before he gets up to his armpits in the diagnosis? I've included it in an attachment and it's appears to be an easy enough process. Maybe it's just spitting into the wind but, at least it's free!
P.S. The attachment tool is only set up for pics and, therefore, won't accept .txt, .rtf, etc. I hope that nobody objects to me copying the instruction text below.
Field Flashing of Portable Generators
This tip comes from the Briggs & Stratton Customer Education Department. As an alter native to flashing a rotor winding with a battery applied to the brushes, an electric drill may be used. Follow these steps to flash the generator:
· Plug the electric drill into the generator receptacle. (Cordless drills do not work)
· If the drill is reversible, move the direction switch to the forward position.
· Start the generator
· While depressing the trigger on the drill, spin the drill chuck in reverse direction. This will excite the field and the generator will now produce electricity. If spinning the chuck one direction does not work, try spinning the chuck in the other direction as you may have the reverse switch positioned backwards.
Use caution not to get your hand or other materials caught in the chuck. As soon as the field is excited, the generator will produce power and the drill will turn on.
The reason this works is because the electric motor in the drill will act as a small generator when spun backwards. The magnets in the drill's motor induce a voltage into the motor windings, which is fed back through the trigger, cord and into the generators receptacle. From there it goes into the power winding of the stator. The voltage going through the power winding creates a magnetic field, which is intensified due to the iron core of the stator laminations. The rotor intersects this magnetic field as it is spun past the power winding, thus inducing a voltage in the rotor winding. Once current flow is present in the rotor winding the rotor has been flashed.
If flashing the field does not make the generator work, you may have additional problems, besides a lack of magnetism in the rotor. Further testing will be needed. Hopefully, this will give a simple way to field flash your generator if needed - Bruce Perrault
The Precise Engine Repair web site is maintained by Bruce Perrault
The last update to this page was made Sunday, December 07, 2006.
Copyright © 2005-2007 Precise Engine Repair, Inc.
Last edited by ironhat; 01-04-2015 at 06:11 PM.
Reason: Add P.S.