253 wont start / run

[Sandaro]

If you have just put in the electronic cool for the first time, it needs different wiring done, as said to give 12volts all the time

[Wombat7051]

Hey all, gave up and decided to use another 253 I had. Pulled the manifold and no cross over hole, but one on the heads. Would that have caused problems?

[damienengland]

Hey all, gave up and decided to use another 253 I had. Pulled the manifold and no cross over hole, but one on the heads. Would that have caused problems?

I think the exhaust crossover will help warm the inlet manifold for better fuel burn when the engine is cold and also allow the mechanical choke heater to operate if you've got one...might be wrong on the fuel burn bit, but i'm convinced i've read it someplace.