96 Mercury 90 hp 2 stroke stalls after 15 min.

[steinjo]

My outboard runs for 15 minutes and then stalls and wont start until it sits for 45 minutes. Is this a symptom of running too lean and a sensor shuts itself down? Maybe temp? It doesn’t smoke at all and i have a oil reservoir. Thinking of draining that and just moving to premixed fuel. Thanks

 

[steinjo]

Adding more to maybe get a reply from someone. Just had a mechanic replace fuel line, stator, plugs. Idles fine at dock but after running for 15 minutes it stalls and won’t even turn over for 15 - 20 minutes. Then starts up fine again. Thanks.

 

[roscoe]

Is the motor running hot? Does it seize up, or shut off?

Is water pump working?

 

[Ric Flair]

Check your fuel tank vent.

 

[bstig60]

Ditto on the fuel tank vent... That sounds like you are creating a vacuum in the fuel tank and starving the engine of fuel. On board fuel tank or portable??

 

[tacx]

Yep, sounds like a vacume in the tank. Check the vent.