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CARBURETER ADJUSTMENTS
If carbureter loads up after considerable service, float level -hould be
checked. Wear on lip of float lever will raise float level. Float level
may be reset by bending lip of float lever down to raise float level or
bending lever up to lower float level. Orly a very slight bend is needed.
If motor stalls while idling, reset idle adjustment screw and throttle lever
adjusting screw. If these adjustments do not correct the trouble, remove
low speed jet tube and clean thoroughly with compressed air. Examine and
see that tube seats gasoline-tight in body casting, top and bottom. If not,
i eplace with a new tube of identical specifications. NEVER CHANGE A LOW
SPEED JET TUBE FROM ONE CARBURETER TO ANOTHER.
Increased resistance on foot throttle indicates a clogged pump jet. Pump
jet should be removed and cleaned with compressed air, which, in many cases,
will remove the dirt or lint. However, it is usually advisable to replace
the pump jet, as its cost is nominal. All jets and ball checks must be seated
gasoline-tight.
Poor acceleration may be due to damaged or worn plunger leather in accelerating
pump, corrosion in pump cylinder, loose or cracked cylinder, cracked plunger
cup or bent pump arm (parts which may be replaced at small cost). If plunger
is removed from cylinder, always use loading tool in reassembling to avoid
damage to plunger leather.
WHEN SERVICING, USE GASKET ASSORTMENT No. 638A, PRICE $0.50; REPAIR PACKAGE
No. 1089C, PRICE $5.98
PART NAMES IN BOLD TYPE, LISTED BELOW, INDICATE CONTENTS OF REPAIR PACKAGE
Part No. IA-17 2-104 3-470S 6-374S 7-107 II-1735 IIB-12 I I B-25
I I B-62 IIB-164 IIB-198 IIB-I99 12-274S I4-2685 14-2705 20-22 20-26 20-29
20-45 20-7 I 2I-45S 24-15 25-33S 30-20 30A-40 39-10 39-11 48-43 53A-225S 53A-276S
61-96 61-97 61-128 61-200 61-231 61-242 61-281
.15 Throttle shaft and lever assembly 1.00
Air horn assembly 3.90
Choke valve 28
Low speed jet assembly .43
Rivet prug . (7) .03
Disk check passage plug .15
Rivet plug . .03
Nozzle plug .15
Pump jet passage plug .15
Idle hole passage plug .15
Nozzle assembly .63
Choke assembly .50
Choke shaft and lever assembly . .57
*Idle hole passage plug gasket. .15
*Metering rod jet gasket .07
Pump cylinder gasket—upper ____ .07
Nozzle gasket .07
Air horn gasket
Float and lever assembly . 1.13
Float lever pin .07
Needle and seat assembly- 1.13
Strainer gauze .15
Idle adjustme
Choke valve attaching screw_ _ ...(2) 2 for .07
Throttle valve attaching screw ._-- (2) 2 for .07
Pump jet, 72 drill .22
Pump lever assembly (Service) . .43
Pump lever assembly. __ _ .43
Pump spring
Adjusting screw lock spring -.... .15
Connector rod spring__ 07
Plunger spring . .15
Choke valve spring_ _ .15
Metering rod spring..-_ .15
Pump connector link spring
Tube clamp assembly ..-_ .35
Spring retainer .07
Retainer ring _ _ _ _ _ . 0 7
Plunger and rod assembly (Identify by
Shaft No. 49-129)
Metering rod—Standard—.067"-.067" to .062"-.062" to
.060"-.046 __-- _
Metering rod—I size lean—.068"-.068" to
.065"-.065" to .064"-.049" - --
Wire clamp screw - - __Throttle shaft arm clamp screw
Throttle lever adjusting screw
_
Dust cover attaching screw and washer assembly Air horn or bowl cover attaching
screw
and washer assembly ._. (7)
Tube clamp screw (2)
Tube clamp nut (2)
Flange nut ..
PART NAME List Price
Flange gasket .$0.07
Throttle valve
.07
nt screw.... .43
.15
(2)
Throttle shaft arm and screw assembly
Throttle connector rod
*Connector link - __ - -
Dust cover Metering rod jet assembly—.093" Dr
Bowl cover gasket
Intake disk check assembly
Discharge disk check assembly Discharge disk check assembly (Sup. by 122-47S)
Metering rod disk
tPlug washer (conical) 136-50 (flat)
tPlug washer (conical) 136-49 (flat) (2)
tPlug washer (conical) 136-48 (flat)_-__. -. (2)
Bowl cover and countershaft assembly -
Pin spring (3)
Pin spring
Gas line fitting (brass) optional..._
Gas line fitting (steel) .________
.15 1163-14
Felt packing --- -- -
-------------------- -
1.00 .43
.43 .07 .07 .07 .07
.07 .07 .07 .07 .28 .35 .15 .72 .43 .15 .35 .35
.03 .01 .01 .01 1.77 .01 .01 .28 .28 .07
'Gaskets so marked must be soaked in 90 proof denatured alcohol for 15 minutes,
installed on part, and let dry before using. t i'1ore: The use of flat
or conical plug washers should be determined by shape of seat in casting.
*117-92 available for service (not used in production).
NOTE: Small figures in parentheses preceding list price indicate number of
pieces used in one carbureter. Where no figure is shown. only one is used.
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