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140 HP Johnson 1980 stalling after 30 minutes

3cehutch

New member
"I have 1980 Johnson 140 HP TN

"I have 1980 Johnson 140 HP TNT, J140TLCS. It has had an intermittent problem for the past 2 seasons. After approx 30 minutes of continuous operation, it starts stalling, miss fires, studders, than completely shuts down. The fuel pump has been replaced, powerpacks and coils have been replaced, plugs are new. I know that it is getting fuel, my clear inline fuel filter is full. It is also hard to start when cold, but it does start. The primer pump seems to work. Could these problems be due to a bad stator / timer base"
 
"Dave, I would test the stator

"Dave, I would test the stator (or have it tested), and may as well check the sensor (timer base) at the same time.

Of course that assumes that the compression is good and the spark is strong at all cylinders..."
 
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