1958 18 hp johnson. Wont start when hot.

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Posted by Tim Ross ( on July 05, 2005 at 16:01:57:

I just had carb rebuilt and replaced mag plate. Took the boat to the lake and setup carb high and low speed settings. The motor will start with two pulls when cold but if the motor dies while running it takes a minimum 30+ pulls to start it again, unless you let it sit for about half hour. Then it will start with two pulls again. I am in arizona at about 110 degrees. Can a boat motor go into vapor lock like a car? This did not start until I replaced the magnito plate, all coils, condensers, wires and points are known good and point gaps are at .020. Dont know what is wrong. Any suggestions.

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