1990 evinrude 140 motor will not throtle up past 2500 rpm in lake/it will hit 4900 rpm indrum or on muffs help

Question

1990 evinrude 140 motor will not throtle up past 2500 rpm in lake/it will hit 4900 rpm indrum or on muffs help

Answer 1

I AGREE WITH STEWPID,,,,,,,,,, SOOOOOOOOOOO NOT GOOD AND YES TO THE PWR PACK AND CARBS AND COILS.....

Answer 2

too much prop or damaged

Answer 3

It sounds like a fuel supply problem, probably related to the external tank or a cracked or cracking supply line that has more chance to flex in the lake and at speed, or what passes as speed.

If you are not using the same tank in each place, try that to see what happens.  It may be a partially clogged in-line filter in one of them if you are using more than one.

Answer 4

Check compression & spark if good then carbs>?Should rev 5800>?Under load sound like you have a dead cyc>?

Answer 5

i wish i could magically stop people from revving motors in neutral.  that is SSOOOO not good.  you either have a coil/power pack issue or need the carbs. cleaned and sync'd.