19

Pump

Gear Box

Maintenance

Tune-up

Pump Performance Curve
This graph shows the relationship between the pump discharge
capacity and the total dynamic head, based on clear water at sea
level. As you increase the total head, the discharge capacity will
decrease.
Wiring Diagram
Pump type Diaphragm with spring-type
connecting rod
Suction port diameter/thread type
3 in/NPT
Discharge port diameter/thread
type
Maximum total head 50 ft (15 m)
Maximum suction head (dry) 16 ft (4.9 m)
Maximum suction head (after
priming pump housing) 24 ft (7.3 m)
Maximum discharge capacity 80 gpm (303 l/min)
Self-priming time 20 sec at 20 ft (6.1 m)
Maximum solid size 2.4 in (60 mm)
Diaphragm Neoprene with nylon cloth
Valves Neoprene with cast iron
inserts
Pump operating
frequency 73 strokes/min.
Gear reduction 43:1
Pump stroke 2.77 in (70.4 mm)
Gear box oil capacity 0.8 qt (0.8 l)
Fuel Unleaded gasoline
with a pump octane
rating of 86 or higher See page11
Engine oil SAE 10W-30
API SJ, or later See page8
Gear box oil SAE 80W/90 GL5
gear oil See page 12
Spark plug type NGK– BPR6ES
DENSO– W20EPR-U See page10
Maximum governed
speed 3,000 ~ 3,150 rpm
Spark plug gap 0.028 ~ 0.031 in
(0.70 ~ 0.80 mm) See page 10
Carburetor idle speed 1,400 rpm See page 10
Valve clearance
(cold)
Intake:
0.15 ± 0.02 mm
Exhaust:
0.20 ± 0.02 mm
See your
authorized
Honda servicing
dealer
Other specifications No other adjustments needed
+200
-150
SPARK
PLUG
IGNITION
CONTROL
MODULE
ENGINE
SWITCH
OIL
ALERT
UNIT
BI BLACK
Y YELLOW
RRED
Y
OIL
LEVEL
SWITCH
BI BI/R