6 Inspect choke piston for free operation in its cyl inder Remove welch plug from cylinder only piston sticks and it is necessary to clean the cyl inder Clean the cylinder with fine sandpaper it necessary 7 Inspect float needle and seat for burrs or ridges If present replace both the needle and seat never replace separately or try to file burrs or ridges 8 Inspect metering rod and jet Replace if bent burred or distorted 9 Inspect all mating surfaces of castings and flanges for burrs gouges or surface irregularities Use a square edge to check throttle flange for warpage All surfaces must be smooth and square to preve n leaks 10 Inspect accelerator pump diaphragm for damage Replace diaphragm and rod assembly if necessary Assembly and Adustments 1 If throttle shaft was removed a Slide shaft in throttle flange b Position throttle plate on flat of shaft with numbered side to shaft then install new screw loosely c Center throttle plate on shaft and in the bore and tighten the screws Peen the screws securely 2 If choke shaft was removed a Use a new vacuum passage O ring seal por sition the choke housing on air horn and instal 1 three attaching screws just snug b Slide choke shaft into air horn part way then in stall piston to shaft and position the shaft b s 3 6 2 8 I 9 io Fig 29 Pump and Metering Rod Assembly 1 Shield Splash 4 Upper Springs 8 Lower Spri g 2 Metering Rod 5 Upper Springs Seat 9 Pump Housing 3 Metering 6 Pump Link 10 Diaphragm Rod Arm 7 Lower Spring Seat Assembly I i BEND HERE METERING ROD TO ADJUST GAUGE TOOL METERING ROD ARM TOUCHES LINK HERE Fig 30 Adjust Metering Rod Arm erotating while installing piston into its cylinder c Tighten choke housing attaching screws d Position choke plate on flat of shaft with identification numbers on air cleaner side e IInstall new choke plate attaching screws loosely center the plate on shaft and in bore and tighten the screws Peen the screws securely using pliers 3 Install throttle flange gasket and flange onto carbui etor body with three retaining screws 4 Install pump diaphragm assembly in diaphragm housing then install diaphragm spring lower and spring retainer 5 Install metering rod jet no gasket with this jet 6 Insitall diaphragm housing screws in housing and thread them 2 or 3 threads into diaphragm to hold dia4 hragm in alignment then install the assembly in carburetor bowl and tighten screws fig 28 7 Install splash shield between metering rod jet and putpnp housing 8 Install metering rod onto the metering rod arm hook the spring and install retainer clip fig 29 9 Install pump and metering rod linkage as follows Refer to fig a Pump lifter link in guide opening insert throttle BEND HERE TO ADJUST 3 Y i Fig 31 Adjusting Float Level