8
NEEDLE SETTINGS
The high speed needle (A) controls the
amount of fuel entering the engine when
the carburetor is fully open. Turning the
high speed needle
counterclockwise
(
richer
) allows more fuel to enter the
engine. Turning the high speed needle
clockwise
(
leaner
) allows less fuel to
enter the engine.
The low speed needle (B) controls the amount of fuel entering
the engine during idle to the mid range. The low speed needle
affects your low end power. Turning the low speed needle
counterclockwis
e (
richer
) allows more fuel to enter the engine
and turning the low speed needle
clockwise
(
leaner
) allows less
fuel to enter the engine.
The throttle stop screw (C) adjusts the idle of the engine. Turning
the stop screw clockwise will increase the idle. Turning the stop
screw counterclockwise will lower the idle. Setting the idle too high
can cause damage to the clutch. Setting the idle too low can cause
the engine to stall frequently.
The factory needle settings for the SS .21 are:
High Speed: 2-1/2 turns out
Low Speed: 1-1/2 turns out
Summary of Contents for SS .21
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