Boat Idle to fast?

Question

All of the sudden my boat's idle has changed to 2k. I have screwed the idle s***w all the way out and all the way in and the the speed does not change a bit. When i manually close the butterfly on the carb to almost closed it will idle good until I give it gas w/the throttle and the butterfly opens. The butterfly will not go back down. Is there something im missing? Any help would be appreciated

Thanks

Answer 1

Try cleaning the carb and linkage with carb cleaner. If this persists, you possibly have a metering needle sticking inside the carb.  Have it rebuilt by a pro.

Answer 2

There is an idle s***w and a fast idle s***w.

You did not mention  what engine you have there but the idle s***w set the gas to air mix at idle, the fast idle s***w is to set the idle rpm. (linkage stop)

The butterfly linkage is spring return operated and it sounds to be that a (binding/sticky)  throttle cable is the couse that it won`t return properly.

Take off the cable and check if the return spring operates ok,

lube the cable and try again.

Frank

Answer 3

Yes the cable needs adj>then use the idle s***w>