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High speed loss of power

pgj

New member
"Hello;
We have a Mariner 40


"Hello;
We have a Mariner 40 Magmum #0D259747 that runs well at idle and to about half speed, than past the 1/2 speed it starts to die out and stop when in gear. If runned by the throttle only, (out of gear)the motor will hit high speed with a little sputter at the 1/2 speed mark.
We have replaced the swicth box,new gas and fuel line.
Tryed to prime the fuel line, and choke at the time the motor started to sputter, no help.
Any help would be great! Thanks"
 
"Welcome to the forum,

How&


"Welcome to the forum,

How's the compression? Motors can die under load, yet sound great on the muffs.
Carbs could be mucked with old fuel, commonly known as "varnishing".

Good luck and keep us posted!"
 
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