I am having an intermittent problem with my 400. The machine was completely rebuilt 4 years ago used 300+- hours after rebuild then stored in building for about 3 years until recently when I needed it again. The engine runs great, the problem is it wont always idle up when i try to strike an arc. I have to get down and Idle the machine up each time, unless i pin the vacum idler to high idle all the time. The next day it may idle up fine all day. I am not sure where to start but it is irritating to say the least. It was suggested that i should take the back cover off and sand the exciter lightly with a sanding block, or replace the vacum idler.
Any other ideas would be appreciated.
Beamwalker