Losing a thousand

[reflect]

I've got a Cougar 21MTR with an early 90's 2.5 carb motor. I normally run 74/76 at about 5900 with a 14x 26 chopper depending on trim. I've had a couple of instances where it would barely run up to 4800 very sluggishly then instantaneously would remedy itself. No misfiring; plugs are fine; new stator and trigger recently. Fuel lines, filters and holly electric fuel pump set at 4-1/2 lbs. just installed. Being an intermitent problem, it's hard to pinpoint. Does anyone out there have any idea what causes it and remedies?

[flabum1017]

Check and clean all your grounds.

[kingsbiship]

Make sure it's not a tach. problem... you should be able to distinguish the drop in RPM!

[Jay Smith]

Make sure battery is HOT ( over 12.5 volts NOT running ) and over 14 running. Low voltage can make one lazy..Also 4 1/2 lbs at the carb IMO is a bit low I'd bump it to 5 to 5 1/2 PSI at the bowl and see if there was any difference..Seperate and clean the 7 pin key switch harness and use an ecto knife to spread the male terminals so that they contact the female with more tention..

Good luck,
Jay