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3A-18 90-13645--2 495 FUEL SYSTEM AND CARBURETION
Specification Sheet - WME
Carburetors
Carburetor Number Stamped at TOP of carburetor
mounting flange.
NOTE: Early model engines may have identification
stamped on face of air box mounting flange.
Carburetor Number Location Model H.P. Main Jet* Bowl Vent Jet*
WME-9 - 1
2
3
Top Carburetor
Center Carburetor
Bottom Carburetor
80 .064 .094
WME-7 - 1
2
3
Top Carburetor
Center Carburetor
Bottom Carburetor
70 .072 .094
WME-10 -1
2
3
Top Carburetor
Center Carburetor
Bottom Carburetor
90 .072 .094
WME-8 - 1
2
3
Top Carburetor
Center Carburetor
Bottom Carburetor
75 .068 .094
WME-11 - 1
2
3
4
Top Carburetor
Top Center Carburetor
Bottom Carburetor
Bottom Carburetor
100 .054 NONE
WME-14 -1
2
3
4
Top Carburetor
Top Center Carburetor
Bottom Carburetor
Bottom Carburetor
115 .076 NONE
* Standard Jets listed are for operation of engine from 0’-2500 ft. (0-762 M) of elevation.
See page 3A-12 (this section) for jet-size chart.
CARBURETOR FASTENER TORQUES:
Main Jet 14 lb. in. (1.6 N m)
Main Jet Cap Plug 22 lb. in. (2.5 N m)
Float Bowl 18 lb. in. (2.1 N m)
Throttle Plate Screw 6 lb. in. (0.7 N m)
(Loctite 609 used, OR:
RC-35 – WITH PRIMER
OR:
Loctite 222 – WITH PRIMER)
Cover Plate Screw 18 lb. in. (2.1 N m)
Back Drag Jet 6 lb. in. (0.7 N m)
Carb. (Air Box) Stud 100 lb. in. (11.3 N m)
Nuts (6)
SETTINGS:
Float Setting 7/16
°
( .015) See photo/dia-
gram (this section), page 3A-18
Float Weight 7 grams ( 1 gr.)
(.4 gr./cc)
Idle Adjust Screw 1-1/2 turns ( 1/4 turn) (set half-
way between lean and rich).
FUEL PUMP SPECIFICATIONS:
Fuel Pump Assembly Bolts 55 lb. in. (6.2 N m)
Fuel Pump Mounting Screws 55 lb. in. (6.2 N m)
FUEL PUMP PRESSURE:
Engine Side at W.O.T. 4-6 psi.
(depending on RPMs)
SEALANTS:
Fuel Pump Check Valve Loctite Pipe Sealant
Assembly w/teflon
Carb Throttle Plate Screw: Loctite 609 OR:
RC-35 WITH PRIMER
OR
Loctite 222 WITH PRIMER