CARBURETTERS NOTEOn dust-proofed carburejmetssggxidenti- ed by a transverse hole drilled inz'the:mk 0f :the suction chambers and no vent hole-,ihfulieldaimper cap, the oil level must be yin. belowth'etopof the hollow piston rod. (2) Check the throttle control action for signs of sticking. (3) Check the idling speed (Tachometer) agai'nst..the gure given in TUNING DATA. ((1) If the reading is correct and the engine runs smoothly, proceed with Operations (Ill) f6( 17). (b) If the reading is not correct, carry out opera- tions (4) to (17). (9) (4) Stop the engine and remove the air cleaners. (5) Slacken both of the clamping bolts (10) on the throttle spindle interconnections. (6) Disconnect the jet control interconnection by slackening the clamping bolts (11). (10) T ,) he: 00473 (7) Restartthe engine and adjust the throttle adjusting screws on both carburetters to :give the correct idling speed as registered by the tachometer. (8) Using an approved balancing meter in accordance with the makers instructions, balanCe the carbus retters by altering the throttle adjusting screWstlthe: idling speed obtained during this operatiOn mini-st: be as given in TUNING DA.TA. (ll) 4'4 420 (a) If after this operation the balance is satisfac- tory and consistent with smooth running at the correct idle speed, proceed with operations (14) to (17). If correct balance cannot be obtained, check the intake system for leaks (i.e. brake servos, engine emission control equipment); if still unsatisfactory, refer to CARBURETTER SERVICING. If with the carburetters correctly balanced the idling is still erratic, carry out operations (9) to (17). (b) (c) Turn the jet adjusting nut (l) on both carburetters to cover the full range of adjustment available within the limits of the restrictor, selecting the setting where maximum speed is recorded on the tachometer consistent with smooth running. Readjust the throttle adjusting screws (5) to give the correct idling speed (see TUNING DATA) if necessary, ensuring that both carburetters are adjusted by an equal amount. If the correct idling speed consistent with smooth running cannot be obtained, refer to CARBU- RETTER SERVICING. Set the throttle interconnection clamping levers (10) sothat the link pin is -012 in. away from the lower edge of the 'fOrkv (see inset). Tighten the clamp bolts-ensuring that there is approximately 315 in. end-oat on the interconnection rod. Engine Emission. Issue 3. 12383