Re: Help!'93 9.9 Johnson won't start when warmed up
Hi.
i would do in this way:
1. warm up the motor up to when its dificult to restart.
2.check the compresion imidietly
3.if compresion is good and even then check spark with spark tester.
if spark is bad, change spark plugs,spark plugs cables(2 cables and caps ofcourse)
after change check spark by spark tester.
if it not help powerpack or coils might be bad
sometimes its good to use transparent fuel hose leadind from fuel pump to carb, to see how fuel pump works and how much fuel pump during work.
i think this can happen if engin loose compresion becouse bad head gasket or powerpack/coil is working bad after warm up