I have a oil leak on a coleman generator
Most likely at the output shaft of the motor. If you are handy, you might be able to replace the crankshaft seal yourself, but this will probably require you to seperate the generator from the motor, and remove the cover holding the seal. If the leak is small, it may be best to just keep adding oil. If you have to take it to be repaired, it may be more expensive than the unit is worth.
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