Small Engine Troubleshooting Problems? Ask a Mechanic Now.
Welcome to JUST ANSWER small engines, let me try to help you !! I don't know it all, but maybe together we can get you a satisfactory answer!
If it happens only when the blades are running check the blades and belt for being free to turn. The electric clutch should run less than 5 amps, so if the fuse is blowing, (usually 20 Amp) the clutch may be drawing too many amps and is blowing the fuse. The only way to remedy that is to replace the electric clutch if it is drawing too many amps.
I see question is still open, did you find problem?