Bradel - no, you need to fix or repair the wiring to reduce the current consumption. I ended up completely bypassing the pump fuse in my '82 931, installing two modern inline fuse holders to replace the single fuse which was overloaded. Schitty electrical design, the engineers who signed off on those changes should be taken out back and gassed in the proper German tradition
Kidding aside, I would definitely fix that problem, the fuses should not be running hot enough to burn!
Rik's right about the in-tank pump, very important point. However this does only apply to later cars and turbos; earlier NA's don't have the in-tank pump. Think the changeover might be around 80 or 81, not sure...