racerden
Boat #197
- Joined
- May 11, 2009
- Messages
- 1,008
- Reaction score
- 59
Been asked this question alot:
"What happens when I screw in/out the metering block mixture screws; When I turn them in, is it leaning the idle fuel mixture or visa versa?"
Answer:
NO; idle mixture already happened inside the carb in the emulsion tubes. This mixture comes from:
Fuel- fuel well to the idle emulsion tube/passage orifice
Air- air bleeds top of main body. Their signal comes from the throttle body vertical slots at the throttle plates.
All you are doing when you turn the screws in or out is controlling the FLOW of the already mixed fuel & air. Basically they should be called idle flow screws, not mixture control screws. So if you have a carb that doesn't stall or severely stumble at idle when the screws are bottomed out (and all engine electrical & mechanical is where it should be) the mixture must be leaned internally.
Hope it helps!
Denny
________
HOMEMADE HEAT GUN VAPORIZER
"What happens when I screw in/out the metering block mixture screws; When I turn them in, is it leaning the idle fuel mixture or visa versa?"
Answer:
NO; idle mixture already happened inside the carb in the emulsion tubes. This mixture comes from:
Fuel- fuel well to the idle emulsion tube/passage orifice
Air- air bleeds top of main body. Their signal comes from the throttle body vertical slots at the throttle plates.
All you are doing when you turn the screws in or out is controlling the FLOW of the already mixed fuel & air. Basically they should be called idle flow screws, not mixture control screws. So if you have a carb that doesn't stall or severely stumble at idle when the screws are bottomed out (and all engine electrical & mechanical is where it should be) the mixture must be leaned internally.
Hope it helps!
Denny
________
HOMEMADE HEAT GUN VAPORIZER
Last edited: