Engine starting

Engine starting

So that full advantage may be taken of the progressive action starting device the engine should be started as follows:

1 Cold starts

The starting device should be moved across the position 'A', (FIG 2:6). Once the engine has fired push the control in partially.

2 Warm starts

Only partially move the starting device as shown in position 'B' (FIG 2:6).

3 Engine warm-up

As the engine begins to warm up to its normal operating temperature, gradually push home the starting device lever so as only to supply the engine with the richened charge enabling the cold engine operation to be smooth and regular. Position 'B' (FIG 2:6).

4 Normal car driving:

Once the engine has reached its normal operating temperature the starting device should be completely brought out of operation by bringing the control lever to the position 'C (FIG 2:6).

Idle speed adjustment

The idling speed of the engine is adjusted by means of a throttle setscrew and the mixture setscrew, the position of which are shown in FIG 2:7. The throttle screw allows for the adjustment of the throttle butterfly opening, the conical mixture setscrew meters the amount of charge issuing from the idling speed passage which causes the mixture to blend with the air flowing past the throttle that leaves a gap between its edges and the throat walls. This ensures a correct petrol/air mixture ratio best suited to the engine requirements giving smooth operation.

The engine idling speed must always be adjusted when the engine is at its normal operating temperature and then setting the throttle butterfly position to its minimum opening position by adjusting the throttle setscrew so giving a steady engine speed. Turn the mixture screw in or out so as to set the mixture richness to the most suitable ratio for the selected throttle opening. This will accomplish a fast but steady idling. Reduce the minimum throttle opening slightly by adjusting the throttle setscrew until the best idling speed is obtained.