Service Manual

PERIODIC MAINTENANCE 2-5
Specifications
Item Standard
Fuel System
Idle Speed (1):
Low Idle Speed (Carburetor idle rpm) 1 450 r/min (rpm)
Low Idle Speed (Governor idle rpm) 1 550 r/min (rpm)
High Idle Speed 3 600 r/min (rpm)
Air Cleaner:
Type:
FR Models Single stage filtration system
FS and FX Models Dual stage filtration system
Pre-cleaner:
FR Models Paper element
FS Models Foam element
FX Models Paper element
Second-stage cleaner:
FS Models Paper element
FX Models Foam element
Engine Top End
Valve Clearance:
Inlet, Exhaust 0.05 ∼ 0.10 mm (0.0020 ∼ 0.0039 in.)
Valve Seating Surface Angle:
Inlet, Exhaust 45°
Valve Seating Surface Width:
Inlet 1.2 ∼ 1.8 mm (0.047 ∼ 0.071 in.)
Exhaust 0.8 ∼ 1.6 mm (0.031 ∼ 0.063 in.)
Lubrication System
Engine Oil:
Type SF, SG, SH, SJ or SL class
Viscosity SAE 40, SAE 30, SAE 10W-30/SAE 10W-40, or
SAE 5W-20
Capacity 1.8 L (1.9 US qt) (When the oil filter is not removed)
2.1 L (2.2 US qt) (When the oil filter is removed)
Level Operating range (grid area (ADD and FULL)) on dipstick
Electrical System
Spark Plug NGK BPR4ES
Spark Plug Gap 0.7 ∼ 0.8 mm (0.028 ∼ 0.031 in.)
(1) Idle speeds may vary depending on each equipment. Refer to the equipment specification.