2005 Glastron 3.0 mercruiser

[lachlann1]

I have an issue with my TKS carb when idling and I see everybody else is to. Can the cap on the idle mixture screw be removed?? Other than that everything works fine. I was watching a mechanic rebuild a TKS on youtube and when he came to the idle mixture screw he said he would be back in a minute, returned and nothing said about the mixture screw, is there a big secret out there that mercruiser doesn't want us to know lol. thks

 

[alldodge]

Shhhh not so loud, Not Merc its the EPA, they are adjusted for low emissions

carburetors. The new adjustable idle mixture screw has a 16º taper and the special cap
has been C.A.R.B. approved to allow mixture adjustment only by dealers using the
special tool. The new taper will provide a finer adjustment.