34
4-3-6 Carburetor
At high altitude, the standard carburetor air-fuel mixture will be excessively rich.
Output power will decrease, and fuel consumption will increase.
Engine performance can be improved by installing a smaller diameter main fuel jet in the carburetor and
readjusting the pilot screw.
If you always operate the engine at altitudes higher than sea level 1000 meters over, have Fuji Heavy
Industries Ltd
’
s authorized dealer perform this carburetor modification. If not, should lower load power
in operating gasoline engine.
Even equipped with suitable carburetor, engine horsepower will decrease approximately 3.5% for each
300 meter increase in altitude. The effect of altitude on horsepower will be lowered greater than this if
no carburetor modification is made.
If a carburetor suitable to high altitude is equipped with engine suitable to a lower altitude, the
lean air fuel mixture will make engine output power lowering, over-heat and seriously damage.
The gasoline enters into the carburetor from the fuel tank and fuel filter. The fuel filter can filter the
foreign matters in the gasoline and oxide out of the fuel tank. If having quality defectiveness, partly
foreign matters will enter into the carburetor.
Otherwise, the gasoline contains some composition which can form the colloid after long sediment, and
attach in the carburetor parts (such as main jet) oil path and float chamber surface.
The air enter into the carburetor through air filter, based on the intake can not be too much resistance and
other factors to consider, the filter can not be too dense and therefore part of the air in the tiny impurities
will enter into the carburetor through the air cleaner.
Gasket
Stud M6×105
Thermal gasket
Carburetor
Thermal baffle
Gasket
Summary of Contents for EA190V
Page 1: ...EA190V SERVICE MANUAL...
Page 2: ......
Page 8: ...8 II DIMENSION AND TORQUE 2 1 Engine dimension 2 1 1 Appearance dimension...
Page 9: ...9 2 1 2 Installation hole position 2 1 3 P T O dimension figure Engine Mounting Face...
Page 49: ...49 4 4 Electric diagram Engine switch Engine switch Spark plug Ignition coil Black OFF ON...
Page 50: ......
Page 51: ......
