electrical fuse problem

[RonC]

Is a 25 amp fuse large enough? Most of the Vendors provide a 30 amp fuse with the holder. I use a 30 amp ciruit breaker with no problem.

From Snyder's;
"A-11450-SF Safety Fuse Installation Instructions

Disconnect Battery! Bolt your safety fuse onto the engine side of the starter switch using the same screws that attach the switch. (Note: if the screws are too long and penetrate the starter body by more than 1/4” a short will result)

Remove the wire coming from the terminal box at the starter switch and attach it to the empty screw on the safety fuse.

Attach the yellow wire from the safety fuse to the bolt on the starter switch along with the battery cable. Replacement 30 amp fuses can be purchased at any auto supply store."

I use a 30amp but I have also used a 20amp with no problem

 

[CarlG]

I use one of these, takes the spade type (AGC) fuses. While it's not water-proof, it is resistant.

 

[Tom Endy]

I use a 30amp but I have also used a 20amp with no problem

If you are running an alternator that is capable of putting out 30 amps it should be considered that if the battery is extremely low after start up, the alternator may be sending 30 amps to the battery, which will have to travel through the fuse.

Tom Endy

 

[RobertB]

You may need to get some of this...

When I was into Spridgets (MG Midget/Austin Healey Sprite), the model A of sports cars, one of our best restorers always added a "smoke test" guage to his dash. He converted an old guage, added a "test" button, and mounted a hair dryer heater smeared with grease inside the guage.

A push of the button caused smoke to pour out of the guage. All Brit car guys know the wire if full of smoke, and and your smoke leaks out all at once, the car is toast...(pun intended).

Wonder if there would be a market for "original" Ford Model A smoke test guages?