Should be set by dwell 28-32 degrees approx. .017
The correct maker point gap setting on the 1972 model, 20 hp Mercury outboard is .020in.
30 degrees dwell
.017 The dwell on a 1972 225 ci slant six is 41-46 degrees, the point gap between .017 and .023. So .020 would be your best place to start.
.019
BAD IGN SWITCH
.o17 to .019
Yes, leaving the ignition switch in the "on" position on a 1972 Chevy van can lead to burnout of the ignition switch and other electrical components. This is because, in the "on" position, power is continuously supplied to several systems, which can cause overheating and eventual failure. Additionally, draining the battery can lead to further electrical issues when attempting to restart the vehicle. It’s always best to turn off the ignition when the vehicle is not in use.
4, to 6 degrees advanced, (BTDC) initial, or 30, to 32 degrees total.
.035" is factory using standard point type ignition.
the dwell is 29 to 31 degrees and the gap is .019.
No.
I believe 1967 for Chevy cars and 1972 for Chevy trucks.