Automatic Choke Adjustment The automatic choke setting is index and accomplished by loosening three choke coil housing retaining screws and rotating by hand the housing then hold in position and tighten the screws Adjust Ignition Timing 1 Connect tachometer and timing light to engine 2 Start engine and adjust idle if necessary to 850 rpm with engine at operating temperature 3 Aim timing light at timing tab fig 134 above crankshaft pulley and adjust timing to 24 advance by turning distributor the same manner as on regular Corvair engine CAUTION Under no conditions should the timing be set more than 24 advance NOTE It is not necessary to disconnect the spark advance hose and block the vacuum port on this engine 4 Stop engine and disconnect test instruments UPPER SHROUD Upper shroud removal requires removal of Turbocharger outlined in Section 6M turbine inlet and exhaust piping turbocharger oil lines and diffuser tube as outlined Shroud may then be removed in the same manner as outlined for 10100 and 10500 series LEFT SHIELD Left shield is removed as outlined for 10100 and 10500 series after removal of fuel filter and disconnection of manifold pressure line RIGHT SHIELD Right shield is removed as outlined for 10100 and 10500 series after removing exhaust insulator plate screws and sliding the plate upward 1 2 to 1 clearance W l I i shield is removed as outlined for 10100 and 10500 series after removal of Turbocharger assembly including carburetor and air cleaner and removal of the Air circulating plate left side only removed in winter installed Fig 135 Air Circulating Plate FRONT SHIELD fuel filter AIR CIRCULATING PLATES mw