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Asked in Modification of Old Electrical Work
Can a 30 amp fuse replace a 40 amp fuse on a lawnmower?
You can replace a higher rating fuse with a lower rating provided it works with the device without constantly blowing. So try the 30 amp fuse in your lawnmower and if it doesn't blow and the mower works okay, you are fine. If it blows you will have to go back to 40. ...