Linhai HY510S Service Manual page 144

CHAPTER 3 ENGINE
If float height is not within the specification, check
the valve seat and needle valve;
If either of valve seat or needle valve is worn,
replace both;
If both are fine, adjust float height by bending the
float tang ①on the float;
Measure float height again till it's within the
specification
Fuel Level
Place carburetor on a level surface. Connect fuel
level gauge① with drain pipe②;
Tool: Fuel Level Gauge
Loosen drain screw ③
Keep fuel level gauge vertical next to the float
chamber line and read the fuel level "a"
Fuel Level: 3.5±0.5mm
If the fuel level is not within the specification, adjust
the fuel level;
Remove carburetor
Check valve seat and needle valve
If either of valve seat or needle valve is worn,
replace both;
If both are fine, adjust float height by bending the
float tang ①on the float;
Install carburetor
Check again the fuel level
Carburetor Assembly
Reverse the disassembly procedure for assembly
LH500ATV-D SERVICE MANUAL14.0
CHAPTER 3 ENGINE PAGE. 3- 113