Adjusting Carburetor - THUNDER TIGER SLEDGE HAMMER S50 Manual

11

ADJUSTING CARBURETOR

a
d
a. To set the high speed needle (large needle sticking out from the carburetor body), turn the screw as pictured. Initial high speed
needle setting should be 3 turns (close the needle completely, then back out 3 turns). Clockwise turn will provide leaner setting
(lower fuel to air mixture), and counterclockwise turn will provide richer setting (higher fuel to air mixture).
b. To set the carburetor idle (small needle sticking out from the carburetor body), turn the screw as pictured. Initial idle setting should
leave 1mm carburetor gap. Clockwise turn will provide higher idle (larger carburetor opening), and counterclockwise turn will
provide lower idle (smaller carburetor opening). For more details about the engine setting, please refer to ENGINE BREAK-
IN/SETTING procedures to properly set the engine.
c. To set the low speed needle (The low-speed mixture screw is located in the end of the carburetor). turn the screw as pictured.
Initial low speed needle setting should be 6 1/2 turns (close the needle completely, then back out 6.5 turns). This screw controls
how much fuel enters the engine at idle and low throttle. This adjustment will smooth the idle and improve the acceleration to
mid speed. Make this adjustment with the throttle closed, after setting the idle. Turn the screw clockwise gently until it stops. DO
NOT over tighten.
d. Remove the outer foam from filter and make it moist evenly with a few drops of fuel. Put the filter in a plastic bag and knead it
until the foam is saturated, but not soaked.
e. Finally, make sure the air cleaner boot is securely fastened with a zip-tie.
Never run your vehicle without the air filter .If the vehicle will be operated in an area with fine dust, use filter oil or caster oil instead
of fuel. It is important that the foam is only moist to trap dirt and allow air passage. With the foam too wet, limited air can pass
through; therefore, limiting engine performance.
a.
3
b.
c.
d.
e.
Factory Carburetor Settings.
Low speed mixture
Idle
Screw
1/4
1 turns out
Clockwise=Leaner
Counterclockwise-
Richer
1/4
1
b
d
6.5
Low speed mixture
1/2
5 turns out
Clockwise=Leaner
Counterclockwise-
Richer
1/2
5
c
e
3
1mm
Idle speed: High speed mixture:
1mm 2
Adjust Idle Clockwise = Leaner
Screw Counterclockwise-
until 1mm is Richer
obtained.
2
1mm
6.5
1/2
~3 turns out
1/2
~3