Joyner JNSZ1600QL Owner's Manual page 89

Fig.127 intake and exhaust system schematic drawing of engine 480M
The Intake System of Engine 480M includes: air filter, Intake Hose, Guide Cover, Throttle Valve, Intake
Manifold, Intake air preheating hose of Positive Crankcase Ventilation
is 1GD 129 607G, and its basic parameters are as follows:
Filtering area: 100cm2 nominal air flow(L): 600
efficiency:
——The air filter is equipped with a intake air temperature controller. When the temperature is low, the hot
air intake valve controlled by the temperature controller will open and the hot air, flowing by the exhaust
manifold, will be directed into the air filter from the intake preheating hose to supply more hot air and
facilitate the fuel atomization during cold winter. As temperature is high, valve is shutted off and the hot air
is not permitted to enter the air filter.
——See "CAC480M Engine's single port injection system"to know about the throttle valve. The exhaust
system of Engine 480M includes Exhaust Manifold, Heat Insulation Cover, Exhaust Hose, Oxygen Sensor,
Flexible Hose, Three-Way Catalyst Converter, Front Muffler, Rear Muffler.
Removal and assembly of the Intake Manifold Assembly and Front lifting Lug:
1. The Intake Manifold Assembly of the Carburetor Engine.
≥ 9 9% filtering resistance: 2kPa
88
（ P CV ） and so on. ——Air filter type
± 1 50 filtering