The cause is what fuses were invented and are used for:to detect and protect against SHORT CIRCUIT conditions, and /or CIRCUIT OVERLOAD conditions.
You cannot because a five amp fuse would blow because the original fuse was seven point five. and a ten amp fuse would not blow quick enough to save or even be safe to use it in whatever you are using it for.
The starter is failing.
A short somewhere could do it.
It will draw over 18 amps and will blow a 15 amp fuse.
Surely you have had too much eggnog. A fuse is designed to blow if the rated current is exceeded. So the answer is definitely no. If there were such a thing as a million amp fuse you would need a giant crane to even lift it.
from seeing your ugly face
If it is the right size, then yes. But why would you want to do that? if the slot is meant for a 20 amp fuse then most likely there will be more than 10 amps running through it and it will blow almost imediately
Probably a short to ground.
Need to know which 20 Amp fuse is blowing.
Short in the wiring or overloaded circuit.
If you do that the likelihood is that you will blow the 3A fuse quickly. There is a reason why the current fuse is what it is, because it is expecting currents around 80% of 13 A or around 10 A.
Since the resulting short circuit would be outside the amp, it WOULD NOT blow the amp.