Won’t start after running awhile. Options

[Penny]

Hi guys, I’m new here and have a question. Took my 75 2.0 for a 45 minute drive yesterday and it ran like a top. (FYI 55 degrees yesterday.) Jumped in the car to come back home a half an hour later and it wouldn’t restart. Plenty of fuel. First thing I checked was fuel pump relay and it was fine. It wouldn’t even turn over nor any clicks like a dead battery. Nothing. But Radio, lights, etc. all worked. Neighbor eventually came over to give me a jump, then it turned over (could have been simply because it had cooled somewhat by then) but wouldn’t start. Oh, I put in a brand new battery last summer, so it shouldn’t be battery related, I don’t think. While I was waiting for the tow truck, tried to start it again after it had cooled more, about 2 to 2 1/2 hours after initially parked, and it started up perfect. Drove it home. Ran perfect on the way home. Parked safely in garage, turned it off and immediately tried to restart. Nothing, again wouldn’t even turn over. Went out to the garage three hours later, after it cooled, and started with the first turn on the key. Any ideas what I should be looking for?

[wonkipop]

seat belt interlock relay? hides under the passenger seat.
sometimes a remnant of the system finally failing can do this as well.
ie the relay. sometimes it seems when the system was deactivated by owners back in the day, the circuit was still in there along with the relay.
though not sure that 71 had the dreaded seat belt interlock.

or tap the starter with a hammer just to confirm its the solonoid.
you can get a pretty good easy shot at if if you lie on the ground and come in from the back of the car, heaps of room. of course it wasn't raining and the ground was reasonably un filthy when i had to do it.

i've not had the hot solonoid problem in mine since the long trip i took it on.
and a tap with a hammer got it going.
mine did it after a similar long road trip, about 2 hours of continuous driving.
see above.

i'm going to do the mark henry fix when i can get some quality hoist time.

EDIT - the reason that mark henry makes sense to me - is i have a perfectly good starter.
it works fine. spins strong. its not cooked inside. i know its just the solenoid. i can't stand the idea of throwing away a really good bosch starter (i think its a bosch) just to fix a solenoid. the starter itself in a 914 is in not a bad position, its not overly subject to heat where it is. i have another car, a citroen xm, which just cooks starters because its right next to the exhaust pipe out of one side of the v6. it just eats em up. i'm not sure i could ever fix that problem other than just have a new starter ready to go in as the old one dies. but this 914 fix makes so much sense. plus i love fords. i'm a big fan of the 289. or 351 - but windsor. i ain't no snob. (i lie, not a fan of GM product).