Service Manual

3-4 FUEL SYSTEM
Specifications
Standard
Item FH381V FH430V
Caburetors Specifications:
Make/ type Walbro LMF-2 Walbro LMF-1
Throttle bore diameter 24 mm (0.94 in.)
Venturi diameter 14 mm (0.55 in) 16 mm (0.63 in.)
Main Jet (MJ) #78 #88
Pilot jet (PJ) #40
Pilot air screw turns out (PS) 1 1/4 1 5/8
(Idle mixture screw turns out)
Float level Float parallel to carburetor body
Idle Speed: (1)
Low idle speed 1550 r/min (rpm)
High idle speed 3600 r/min (rpm)
Air Cleaner:
Type Dual stage filtration system
Pre-cleaner Foam element
Second-stage cleaner Paper element
Fuel:
Fuel requirement Unleaded regular grade gasoline
Fuel Pump:
Type Pulse-diaphragm pump
Governor:
Type Flyweight all speed governor
(1) Idle speeds may vary depending on each equipment. Refer to the equipment specification.