Joyner JNSZ1600QL Owner's Manual page 97

Fig.142 schematic drawing of engine 480M fuel system
——Adjustment of Peirburg 2E3 carburetor: Idle speed adjustment:
Rotating the screw inward will increase idle speed.
Rotating the screw outward will decrease idle speed.
CO adjustment: Rotating the CO screw inward will enrich the mixture. Rotating the screw outward will
make the mixture lean. Idling up (Idle speed adjustment with A/C on): If engine is equipped with an A/C
system, idle speed should be raised if the A/C is on during idling. By adjusting idle adjustment screw of the
idle up actuator valve, idle speed may be adjusted to the specified valve under load.
2.1 Description for fuel system.
The fuel pump in the fuel tank supplies fuel, though fuel filter, to the fuel injector in the throttle valve
body. The redundant fuel returns to the fuel tank. The vapor from the fuel tank goes into the charcoal
canister by fuel vapor pipe and is sucked into air intake pipe though the fuel vapor recirculation solenoid
valve which is controlled by ECU. For more detailed information, See "CAC480M Engine's single port
injection system".
2.2 for more details of the Fuel pump, fuel vapor recirculation solenoid valve and charcoal canister,
see "CAC480M Engine's single port injection system"section.
1 8 E ngine electrical system.
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The electrical system includes battery, alternator, starter, breakerless distributor, ignition controller, spark
plug, high-power ignition coil, high pressure assembly, water temperature sensor, oil pressure switch,
electric fan, thermo switch, and idle speed solenoid valve of carburetor.
1. Alternator. Output voltage: 14V Rated output current: 90A B+Output D+ to the charging indicator
filling-in bit
——Battery is not permitted to be connected to alternator with the polarities reversed.
——Insure that the ground wire between the alternator and chassis are tightly connected.
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