Walker R21 Operator's Manual page 9

R21
Specifications
ENGINE
Manufacturer/Model
Displacement cu. in. (cc)
Max. Power HP (kW)
Governed RPM
·
Max. Torque lb ft (N
Idle RPM
Spark Plug Type
Spark Plug Gap in. (mm)
Crankcase Capacity qt (L)
Crankcase Lubricant
Oil Filter
Fuel Tank Capacity gal (L)
Fuel
Cooling System
Air Cleaner
ELECTRICAL SYSTEM
Battery
Charging System
Charging Output
System Polarity
Ignition
Starter
Interlock Switches
Circuit Breaker(s)
BLADE DRIVE
PTO
Blade Drive Clutch and Brake
Kohler KT620
40.3 (660)
21 (15.7) @ 3600 RPM
3600
·
35.9 (48.7)
m)
1750
Champion® type RC12YC (or equivalent)
.030 (0.76)
2.0 (1.9)
API SJ or Higher Grade Oil Only with 10W-30 Viscosity Above 0° F
(-18° C), or 5W-30 Viscosity Below 32° F (0° C)
Kohler P/N 12 050 01-S
3 (11.4)
Automotive Grade Unleaded Gasoline (87 Octane Minimum,
10% Ethanol Maximum)
Air-Cooled
Engine Mounted (Kohler)
Kohler P/N 16 083 04-S (Filter), 16 083 05-S (Precleaner)
12 Volt, 300 CCA (Interstate SP-35)
Flywheel Alternator
18 Amp DC (Regulated)
Negative Ground
Electronic Capacitive Discharge
12 Volt Electric, Key and Solenoid Operated
Ignition Lockout by Seat Switch, Transmission Neutral, Blade
Clutch, Parking Brake, and Deck Arm Lock
Two Fuses (5A)
Auto Reset (30A)
Single belt
Electric Clutch [Stops Blades within Five (5) Seconds of Disengage-
ment]
General Information
5