24-07-2020, 12:26 PM
(This post was last modified: 24-07-2020, 12:28 PM by Stuart Giles.)
Unless someone has either drilled or changed the main jet, over rich mixture is usually caused by the fuel level in the float chamber being too high.
If this is the case there is usually a bit of a leak from updraft carbs when you turn off the motor and close the fuel tap; this indicates that the fuel level is above the main jet level rather than just below it.. You adjust the fuel level by moving the needle up or down on the collar which is connected to the float levers.
If this is the case there is usually a bit of a leak from updraft carbs when you turn off the motor and close the fuel tap; this indicates that the fuel level is above the main jet level rather than just below it.. You adjust the fuel level by moving the needle up or down on the collar which is connected to the float levers.