Warm up the engine to operating temperature. The oil temperature must be at least 60°C.
Check ignition timing (see section «Checking and adjusting the ignition timing»).
Check intake system for leaks. To do this, use a brush to moisten all the connections of the intake device with gasoline. If at the same time briefly increase the engine speed, then air will be sucked in at the places of loose connection. Locate and eliminate leaks.
Attention: Do not inhale fuel vapors - poison! Avoid splashing gasoline on hot parts and on the ignition system. Fire hazard!
Check the air filter element.
Turn off all electrical consumers.
Detach the crankcase breather hose from the cylinder head cover and route it so that only outside air can be drawn in.
Start the engine and leave it to idle.
Adjust engine idle speed. Setpoint see table in section «Ignition system». In case of deviations, adjust the idle speed with the adjusting screw at the stop of the throttle valve.
Check CO content. Setpoint see table in section «Ignition system».
Remove the seal from the adjusting screw -A- for the CO content.
If there is no special tool, pierce the plastic cap in the middle, screw in the appropriate screw or self-tapping screw and pull out the screw -A- together with the seal.
Adjust the CO content with the adjusting screw -A- using a 3 mm Allen key. e.g. from HAZET 4516.
Attention: When adjusting the CO content, do not press or lift the adjusting screw with a wrench. With the key installed, do not give gas (bending hazard).
After each adjustment attempt, remove the key and briefly give gas.
Place a seal after adjustment.
Turn off meters.
Connect the crankcase breather hose.
Scheme of the K-Jetronic injection device
1 mixture regulator
1a Air mass meter
1b Fuel quantity distributor
1s CO content adjusting screw
2 Fuel tank
3 Electric fuel pump
4 Fuel tank
5 Fuel filter
6 System pressure regulator
6a Pressure relief valve
7 Nozzle
8 Idle speed adjusting screw
9 Battery
10 Ignition switch
11 Control relay
12 Ignition distributor
13 Start valve
14 Thermal time switch
15 Additional air damper
16 Preheat control
16a Full load diaphragm