Small Engine Troubleshooting Problems? Ask a Mechanic Now.
What is the fuse killing? Mower stopping or is the engine stopping ? What engine is this? Gas or diesel?
Usually it is alternator/voltage regulator or the fuel solenoid. If fuel solenoid has to be energized to keep engine running, it is prime suspect. Do you notice if the solenoid is getting overly hot? Can solenoid be removed and engine ran without it for test?
Next would be to unplug voltage regulator and run test.
What engine? usually the fuel solenoid can be removed, and the hole taped up for test.
oK< well you can't remove it. Check it for getting hot.
Yes alternator output seems fine.
With fuse blowing, it is just a matter of removing or disconnecting things, until you can isolate the overload.
I see question still open, did you find the problem?