LOVE OLD CARS
Robert Wooley posted an answer for this Mercury Floor Machine Mercury: Ultra DC Burnisher 21in - 1.5hp - 1500rpm - Floor Machine:
"The switch has gone bad. Very common on these. The contacts in the switch wear out and..."
"Use your volt meter to test the battery voltage. It should be at least 12.4v . I this is..."
64,756 people helped