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Yamaha 4hp 4stroke stalls at half trottle

shane44

New member
The engine statrts fine and ru

The engine statrts fine and runs fine untile it reaches the half way point on the trottle which has a red mark for starting. When the trottle goes past this point it starts to stall. The higher the trottle the quicker it stalls. The engine starts easy after this. Can anyone tell me where the problem is please?
 
"Might want to check the fuel

"Might want to check the fuel pump.OK but you say it start easy after, But is the pump effectively supplying the demand for gas?"
 
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