Examination
Warm up the engine, the oil temperature must be at least +60°C.
The radiator fan should not be running.
air damper (top choke in carburetor) must be fully open.
Connect a speed meter.
Speed set value see table "Carburetor basic data".
Attention: The idle speed control switch must be connected when checking.
Adjustment
The idle speed and CO content are adjusted by alternately turning the adjusting screws.
The oil temperature must be at least +60°C.
The air damper must be fully open.
Turn off all electrical consumers (light, air conditioning, etc.).
The radiator fan should not be running.
Disconnect the connectors from the idle speed control switch and connect them together (arrow).
Check the idle speed and, if necessary, adjust them with the idle speed adjustment screw. Set value see table "Carburetor basic data".
Check the CO content and, if necessary, adjust them with the CO content adjusting screw. Set value see table "Carburetor basic data".
Connect the idle speed control switch and check the CO content again. Set value see table "Carburetor basic data".
After adjustment, seal the CO content adjustment screw with a blue cap.
Attention: After adjusting the CO content, reconnect the crankcase breather hose. If at the same time the CO content increases, the cause is not an incorrect adjustment, but the ejection of waste from the engine crankcase due to oil dilution during operation, mainly in short sections. After repeated long-distance trips, the proportion of fuel in oil and the retention of CO in the exhaust are normalized. You can also achieve this faster with about 30 minutes of high speed driving or by changing the oil.
Visitor comments