evinrude not reaching full power

[NewYork hunter]

I have a 1976 15hp evinrude. It will run and idle but won't reach its full power potential. It sputters a bit at full throttle and doesn't gain any more speed. The compression is good, correct spark plugs and fuel pump was replaced as advised by a mechanic. Any ideas? Haven't been able to get out yet this season and I'm about to go bonkers

[riverrat8991]

Carbs possibly. Sure all spark plugs got fire?

[NewYork hunter]

carb was taken apart by mechanic and he said it was clean to begin with. He's coming by again to check the carb timing but from what i can see its good. Was thinking maybe the fuel flow pin(can't think of correct name) could be worn?
he used a firing light and they were firing. hopefully going more in depth this evening can get me on the water tomorrow

[jford56]

Float needle pin or level if the float is off. Not getting enough fuel if butterfly is wide open.

[Relentlous]

Spark plug wires tracking

[XHailGC]

Hole in fuel line.

[reeltight]

Check the timing. Sounds like the stator and trigger to me.

[Tater]

Bulb/fuel line.......Replace (with quality).
Carb...................Clean.

Revisit sea trials.

[ecu1984]

with it running wide open and cover off, quickly place hand over throat of carb and see if it speeds up, or have some mixed oil and gas in a small spray bottle and squirt a small blast in there and see if it speeds up. That will tell you if you are starving for fuel or have the wrong air mixture.

[GobblerHntr]

It knows you're a Yankee and it's not going to work for a Yankee

[Tater]

Then there's that, too....didn't take into account you being one of them.