# 78 International Scout that won't start when it is hot

**URL:** <https://community.cartalk.com/t/78-international-scout-that-wont-start-when-it-is-hot/67258>\
**Category:** Maintenance/Repairs\
**Created:** [August 20, 2011, 12:39am UTC](https://community.cartalk.com/t/78-international-scout-that-wont-start-when-it-is-hot/67258 "2011-08-20T00:39:49Z")\
**Posts on this page:** 4\
**Page:** 1

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**Author:** ![78scout](https://avatars.discourse-cdn.com/v4/letter/7/df788c/32.png) [@78scout](https://community.cartalk.com/u/78scout)\
**Post date:** [August 20, 2011, 12:39am UTC](https://community.cartalk.com/t/78-international-scout-that-wont-start-when-it-is-hot/67258/1 "2011-08-20T00:39:49Z")

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I have a 1978 HI Scout that starts ok, runs ok, but then if it gets too hot, it stalls and won’t start until it is cool. Also, sometimes after driving it for a while and then stopping for a few minutes, it won’t start until it is cool, even without having stalled. Any advice? Could this be a problem with the carb?

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**Author:** ![cigroller](https://avatars.discourse-cdn.com/v4/letter/c/c68b51/32.png) [@cigroller](https://community.cartalk.com/u/cigroller)\
**Post date:** [August 20, 2011, 12:53am UTC](https://community.cartalk.com/t/78-international-scout-that-wont-start-when-it-is-hot/67258/2 "2011-08-20T00:53:55Z")

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Its much more likely to be a spark problem rather than a fuel/air (carb) problem. I’d guess at the ignition coil first. You might get a can of compressed air, locate the coil & the next time it won’t start use the air to accelerate the cooling of the coil. If that makes a difference replace the coil.

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**Author:** ![Tester](https://sea1.discourse-cdn.com/cartalk/user_avatar/community.cartalk.com/tester/32/15976_2.png) [@Tester](https://community.cartalk.com/u/Tester)\
**Post date:** [August 20, 2011, 1:00am UTC](https://community.cartalk.com/t/78-international-scout-that-wont-start-when-it-is-hot/67258/3 "2011-08-20T01:00:43Z")

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The stall/no start problem might be caused from vapor lock. Especially if the gas you use contains ethanol.

Carry a bottle of water in the vehicle, and the next time the engine stalls/won’t start, open the hood and pour the water on the fuel line going to the carburator. If the engine starts the problem is vapor lock.

Tester

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**Author:** ![78scout](https://avatars.discourse-cdn.com/v4/letter/7/df788c/32.png) [@78scout](https://community.cartalk.com/u/78scout)\
**Post date:** [August 20, 2011, 4:09pm UTC](https://community.cartalk.com/t/78-international-scout-that-wont-start-when-it-is-hot/67258/4 "2011-08-20T16:09:01Z")

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Thanks guys, I will give those things a try first.