Linhai HY510S Service Manual page 143

CHAPTER 3 ENGINE
Check the diaphragm ① for tears;
Tears: → Replace
Check the spring ②,cover ③ for damage and tears;
Damage or tears: → Replace
Check the jet needle①, mail jet②, needle jet③, pilot
air jet④, pilot jet⑤, starter jet⑥ and starter plunger⑦
for wear and bends;
Wear or bends: → Replace
Check above jets for clog. Blow out the jets with
compressed air.
Insert piston valve into carburetor body and check
the free movement;
Check free movement of throttle valve. Replace with
a new one if it's stuck;
3. Measurement and Adjustment
Keep the carburetor in a upside down position.
Measure distance "a" from the mating surface of
float chamber (without gasket) to the top of float.
Note: The float arm should rest on the needle valve. Do
not compress the needle valve.
Float Height: 10±1mm
LH500ATV-D SERVICE MANUAL14.0
CHAPTER 3 ENGINE PAGE. 3- 112