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I have a 90 horse johnson that started acting up on me this year.
It ran fine for the first three times it was taken out this year , now it will only give me 3,000 rpm instead of 5,500 On occasion it will run at 5,500 but only for a few minutes, then it will die down to 3,000. Anybody have any input? I have a date with the Gorge next friday.I would really like to have all the 90 horse when the gorge turns on a dime.
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Sounds to me like it may be either a miss firing cylinder or fuel. I've had both and niether makes forn a fun day fish'n. Try running the motor with the cover off, and pulling one plug wire off at a time, does the motor hesitate more or no change. Did you de-winterize? Meaning change plugs treat the fuel, ect? I bought some stuff from Marine Products called Sea Foam gas treatment. Not an alcohol product but it really made a differance in the performance of the motor, now trying to find more up here in Davis county. I don;t know if im much help. good luck.
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I buy my Sea Foam at Napa Auto Parts. I'm pretty sure they all carry it.
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my motor was doing the same thing a couple of years ago and it turned out to be a bad cylinder. check your plugs for fouling. im no expert, but thought id give you my 2 cents. good luck!
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check your fuel lines!!!! it sounds like your pulling a little air along with the fuel.
in fact dont check them just replace them I replace mine every year and also carry new ones in my boat at all times because even a small pinhole leak can pull air through and air is easier to draw than fuel thus you will starve your motor.
an outboard motor doesn't run like a car it doesn't accelerate by opening the venturi on the carberator it does it by advancing the timing so a constant fuel flow is vital.
dont forget to make sure that the fittings on the tanks are still good and that the vent is open.
DZ
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WHAT DID GOOBER TELL YOU. HE SHOULD KNOW. IF YOU DONT KNOW GOOBER ASK RON TO TALK TO HIM FOR YOU.
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what year is the mator?
if it's a older motor then it might be the fule pump diaphragm..
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Kinda sounds like it might be sucking some air in the fuel line.
Hey, not to change the topic, but where did you get your Icon pic ?? I have that same pic in a book or it's the cover of one of my books. I've always like that one. later chuck
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Thanks for all the help. I think I have narrowed it down, to two things, air leaks in the lines and water in the tank. It seems that the Chevron plant shut down for a spell due to a large amount of water in thier fuel. Well I got a good dose that was shipped to duchesne. Looks like Ill have all 90 horses for the gorge,and Ill need them when I hook "OLD SPOT" to chase her down..... Yeh HAA
About my icon, I did a image search on walleye on msn image search.
Once again thanks for all the help. My boat is what keeps me sain.
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ly enough, anything could be causing it, though I find missfiring a stretch out the window.. besides, if it missfires, running at 3000 rpm and then bumps up to what it should be running, I would think there would be a Backfire from the extra gasoline in the motor... but, who knows, It's been awhile since I delt with any motors... 