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75 HP outboard high idle

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dgross

New member
I have a 75 HP outboard on a houseboat. I think it is a 1990. When I start the motor it immediately runs like it is going full speed. It doesn't matter whether the button is pushed in on the throttle control lever or not. I checked the motor with the cowling open and could not see anything obvious. Do I have a stuck throttle, a bad control lever, or something else?
 
galamb said:
Has it always done it (or since you have had it)?
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No, I took it for a cruise a week ago and it was fine. It was a little hard to start this time and when it did it went to the "high idle" or full throttle condition. I have tried moving the throttle forward and reverse, in and out of gear, and can not see anything obvious.
 
johnnygjr said:
Check your throttle linkages manually to see if throttle plates in carbs are opened up all the way.
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I think they are open. Also, the Quicksilver throttle is stiff to move. Can I lubricate it or adjust them? How would I know if they should be replaced?
 
I would lube "everything that moves" before I started replacing things.

There is a spring on (behind) the throttle lever that may be getting weak, but a good shot of lube might work wonders.

Also check that your butterflies on the carbs are closing fully - might need some lube on that linkage as well.

Watch everything that "moves" with the hood off (have someone else work the controls) and if it moves, lube it :)
 
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