E FUEL SYSTEM port into the venturi The check ball in the pump plunger head is a vapor 6 vent for the pump well Without this vent vapor r pressure in the pump would force fuel from the niiii pump system into the engine manifold causing hard starting when the engine is hot li s te There is another hole in the pump lever into which V l the accelerator pump rod can be inserted to prO l J V vide quicker pump action This adjustment setting l i is L1S d only in extreme c0ld temperature condi In to tions The pump discharge check ball in the dis A charge passage prevents discharge of fuel from the Q pump nozzles when the accelerator pump is in operative 0 E 31 Choke System E The choke system consists of a manually operated 2856 choke valve a fast idle connecting rod and a fast pre ErQ2 YAIR HORN BODY idle arm The choke valve is offset spring loaded luleloat to prevent over choking during the starting warm 2 Power Piston up period When the choke valve is moved to a jE l r i closed position for starting the fast idle connector rod revolves the fast idle link This action increases to choke trip lever at errd of the Choke Shaft for the engine idle speed to prevent stalling during the ease m reassemblv warm up period A fast idle connector rod return spring prevents partial closing of the choke valve E 34 Fuel Bowl Body Disassembly E 32 Carburetor Removal a Remox le lreturxlt st rlDng1ofl pdumpRplunger ang a Remove attaching wing nut and air cleaner from pumr We mm ue OW O y emove Sma aluminum check ball from bottom of pump well Cerburetoh by inverting fuel bowl body and shaking into hand tn Rentlove throttle cable from ball stud on throttle Remove pump mlet Sereerr from bottom ol fuel EVE 3 3p el bowl c Disconnect fuel line from carburetor inlet htting b Remove mom metermg jets from fuel bowl body d Disconnect positive crankcase ventilator hose using Tool C 3748 rrorh rllpple oh carburetor r odY c Remove power valve and fiber gasket from fuel e Disconnect distributor vacuum line from throttle bow body discard gasket body or orlrprlreroh d Remove three attaching screws venturi cluster f R m0V OUT 3tt3 hi g CBD f W 31 b Y t0f assembly and gasket from fuel bowl body Center and gasket mm i 8k manifold screw has smooth shank and fiber gasket for the accelerator pump fuel bypass and seal E 33 Air HOFN B dY Removal and e Using a pair of long nosed pliers remove T D 53S mb y shaped retainer accelerator pump discharge spring a Remove attaching screws and carefully lift air and steel discharge ball from fuel bowl body hO1 I1 body upward to f mOVC fI O1 I1 fuel bowl body f Remove two inserts from main we l b Place air horn body in inverted position on bench Remove fioat hinge pm and lift fioat as E 35 Throttle Body Removal and sembly from cover Remove inlet valve needle Dlsassembl from float arm Remove needle seat fiber gasket y and seat screen from air horn body discard gasket a Invert ruel bowl body remove three arraehlhg See Fig E 22 screws throttle body and gasket discard gasket o Depress Shaft and allow Spring to Snap re b Remove idle mixture adjustment needles and peatedly to remove power piston from air horn Sprlrlgs rrorh rhrorrle body hodY rrhls wlll force power plsroh reralhlhg Washer Note No further disassembly of the throttle body rrorh alr horh bodY is required The throttle valves should never be d R f 0V f t3i F from d Of 8 1 1 3t01 Dump removed as the idle and spark holes are drilled in DlU Y Shaft Remove Dump 3 mblY fmm Pump direct relation to the location of the throttle valves ifmcf Hfm L00S S f S Zf W OU i 1 Hfm afld f and shaft Removal of the throttle valves will upset m0V 0U 1 lever and Shaft from Pl g Y Remevc this alignment The throttle body assembly is serv 3 l t mm al h0Y b0dY OY fuel b w1 bOdY md iced only as a complete assembly with throttle discard valves intact e Remove two retaining screws and choke valve plate from choke shaft Withdraw choke shaft from air horn body Remove choke lever and collar from E 36 Ca bu 8t Cleanmg and I P t choke shaft Note position of choke lever in relation Dirt gum water or carbon contamination on the 122