Demon Fuel Systems 5563020GC - Manual (Page 15)

15
On engines that idle below 1,000 RPM,
set the primary butterflies open to the .020” (square) as
described above, but the secondary butterflies should be set to the bottom of the transfer slot. In
other words, at idle speed the secondary transfer slots will not be visible when viewed from the
bottom, but any movement of the secondary butterflies will expose the slot.
The next step is to provisionally set the Idle-
Eze™. Insert a screwdriver through the air cleaner stud
hole to engage it, and turn the screw clockwise until the screw stops. Now, reverse it counter-
clockwise by 1-1/2 turns. This will serve as a good baseline.
Use a screwdriver through the air cleaner stud hole to control the engine’s RPM. Once the RPM is set
approximately and the engine is running at normal operating temperature, begin to adjust the idle-
mixture screws. Adjust the screws either in (leaner) or out (richer) until the engine reaches its
optimum idle. Adjustments in small increments of, say, approximately 1/4-of-a-turn at a time is
recommended. Once the idle mixture has been set, adjust the Idle-
Eze™ by using a screwdriver
through the air cleaner stud hole to reach desired RPM. Once satisfied, install the air cleaner stud
and a
ir cleaner and make sure its presence doesn’t change the idle settings or RPM. If it does, the
carburetor will require readjustment so it performs properly with the air cleaner installed. Once it does,
you’re finished and ready to enjoy your carburetor.
For further questions, please contact our technical department at 1-270-901-3346.