there is no HS screw adjustment like older carbs ….. in a 9.5hp   it is simply a screwed-in mini plug with  a calibrated hole (jet)    it sits behind the bottom bolt you  see  way the  bottom front of the carb.

The jet IS NOT accessible from the bowl .    twe min jet plug can be unscrewed out but best to just flush it clean with carb cleaner  if you do not  a perfectly fitting tool to unscrew it

Did you watch the videos I provided ???

If the engine needs to be choked after all the cleaning you did one must assume  that is it not  “sucking enough air ” to cause vaporization  of fuel out of the LS  drip holes .

Closing the choke  just concentrates the  available   vacum  on the LS circuit of the carb  and  may simply  loss of a certain % of vacum  via cranckcase seals.

revisit the vidoes… make certain ALL holes are open  incl.  and  free open ones (if any)  needed to balance atmospheric air pressure and prevent airlocking

sorry my carbs  are  at the cottage  so I can’t  inspect one closely….

does it idle better if you set the idle RPMS a bit higher with the side knob ??

just turn the side knob which will limit the throttle  handle travel at the optimum idle position and don’t worry about it  if everything  else is adjusted and clean .

go fishing !

• This reply was modified 2 years, 3 months ago by crosbyman.

The high speed jet has to be pretty plugged up to affect idle quality.  So, if the engine runs OK at high speeds, I’m sure the idle issue has nothing to do with the high speed jet.  In any event, don’t try to remove that jet without the proper jet screwdriver, you will bung up the threads and the jet.  You and try to use a pipe cleaner soaked in carb cleaner, try passing it through the fixed jet while it is still in place on the carb.

You may be able to get a better idle adjustment once you have the engine on the boat and take it for a good run on the water.