20A fusible link -vs- 20A in-line fuse
 

Is the tolerance between a 20A fusible link and a 20A fuse the same? I had to replace some wiring on my 85 and replaced the 20A fusible link with an inline fuse holder. I used a 20A fuse. Now, the fuse blows frequently. The fusible link never did "blow". Is the 20A rating the same or should I look for some electrical issue causing the 20A fuse to blow?

try a 25 amp

Here is my theory on this....fusible links should be used to power multiple circuits, as they are less prone to blow on short lived spikes in amperage. Inline fuses should be used to protect individual circuits, where amperage in excess of normal draw of the component can damage the component that is being powered. In other words, fusible links protect the whole system from meltdown due to dead shorts to ground. Fuses protect individual components. Both should be used and one should not replace the other. Mileage may vary (or I may be wrong).

I aggree,

Thanks for the replies. This fuse is for the cooling fans. So, I think that a fusible link will be needed rather than the inline fuse. Great information -- thanks.

I can't remember where I read it, but there is big difference between the two. The bottom line was to replace the link. You can buy fusible link wire in a roll.

Another option would be to use a 'slow blow' 20 amp fuse.

Never go to a higher rated fuse than the circuit calls for.

You'll just be inviting a meltdown and/or fire.

I've always had trouble determining when a fusable link has blown. Also most times, it's easier replacing a fuse than a link. My 2 cents.

Fuse links react slower than fuses. Good for motor circuits in particular. Fuses can blow under quick current spikes, like when motors start up. Takes more juice to start a motor them than to run them.

But the length is critical. get made up ones at NAPA or wherever.

They are essentially reduces sized wire of specific type and length.

Typically two sizes smaller than the wire specified so a 20 amp fuse link would be #16 Gage.

i would do a slow blow fuse