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mariner 150 hp dies at high speed

sayed

Contributing Member
dears

I have 150 hp mariner it runs good at low speed but it will die at high speed, carb has just been rebuilt and new spark plug .

Please help.

regards
sayed
 
First thought that comes to mind is something is causing no fuel to your motor.... Did you check for a collapsed bulb, is the tank vent clear, is your filter new? You may have some crud on the dip tube in your tank. Might be this ethanol stuff has ruined the inside of you fuel lines. Hope this helps...BF
 
I agree w/BF...Get someone to ride in the back and squeeze the ball when it starts to sputter. If it keeps running the fuel pump may have a small hole in the diaphragm and can't keep up with the fuel demand.
 
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