Ayuh,..... At the keyswitch, with a test light, is there power at the battery terminal,..?? Usually a red wire,...
With the key "On", is there power at the ignition terminal,..?? Usually a purple wire,....
With the key to "Start", is there power at the start terminal,..?? Usually a yellow/ red...
Ayuh,....... When you take the distributor cap off,.... There'll either be a set of points starring back at you,....
Or, an electronic trigger of some sort that tells the coil to fire,....
'n Yes, I've set 'em with a matchbook to get it running enough to get to the shop, where they...
Ayuh,..... As in the diagram from AD, the fuel pump is fed power from 2 points,....
It primes when the starter is engaged from the outside tiny terminal on the starter's solenoid,....
When the motor starts, the power is fed by the key switch, in yer case, off the coil's terminal, through the...
Ayuh,...... Welcome Aboard,....... Yer problem sounds like a key switch issue, definitely not a coil issue,.......
With a meter, or test light, test the key switch, before you start blowin' money on anything else,.....
Ayuh,..... Welcome back gator,...... To fix yer idle problem, set the idle screw to 650/ 700 rpms(spec),....
It should be the same, in the water, or out, in gear, or not,.....
If it stalls, odds are it needs to be richened up abit,....