Owner's Manual

17
TAKING CARE OF
UNEXPECTED PROBLEMS
Engine Will Not Start
Pump Will Not Pump
TECHNICAL INFORMATION
SERIAL NUMBER LOCATIONS
There are two serial numbers, one for the engine and one for the
frame. Record the engine and frame serial numbers in the space
below. You will need these serial numbers when ordering parts and
when making technical or warranty inquiries.
Engine serial number:_____________________________________
Frame serial number: _____________________________________
Date of purchase: ________________________________________
CARBURETOR MODIFICATION FOR HIGH
ALTITUDE OPERATION
At high altitude, the standard carburetor air-fuel mixture will be too
rich. Performance will decrease, and fuel consumption will increase. A
very rich mixture will also foul the spark plug and cause hard starting.
Operation at an altitude that differs from that at which this engine was
certified, for extended periods of time, may increase emissions.
High altitude performance can be improved by specific modifications
to the carburetor. If you always operate your pump at altitudes above
5,000 feet (1,500 meters), have your servicing dealer perform this
carburetor modification. This engine, when operated at high altitude
with the carburetor modifications for high altitude use, will meet each
emission standard throughout its useful life.
Even with carburetor modification, engine horsepower will decrease
about 3.5% for each 1,000-foot (300-meter) increase in altitude. The
effect of altitude on horsepower will be greater than this if no
carburetor modification is made.
NOTICE
When the carburetor has been modified for high altitude operation,
the air-fuel mixture will be too lean for low altitude use. Operation at
altitudes below 5,000 feet (1,500 meters) with a modified carburetor
may cause the engine to overheat and result in serious engine
damage. For use at low altitudes, have your servicing dealer return
the carburetor to original factory specifications.
Possible Cause Correction
Ignition switch OFF Turn the ignition switch ON
(page 6).
Fuel valve OFF Turn the fuel valve ON (page 6).
Choke lever in the wrong
position
Move the choke lever to the
CHOKE position, unless the
engine is warm (page 6).
Throttle lever in the wrong
position
Move the throttle lever slightly to
the left (page 6).
Out of fuel Refuel (page 11).
Bad fuel; pump stored
without treating or draining
gasoline, or refueled with
bad gasoline
Drain the fuel tank and carburetor
(page 16).
Refuel with fresh gasoline
(page 11).
Spark plug faulty, fouled, or
improperly gapped
Gap or replace the spark plug
(page 10).
Spark plug wet with fuel
(flooded engine)
Dry and reinstall the spark plug.
Fuel filter clogged,
carburetor malfunction,
ignition malfunction, valves
stuck, etc.
Take the pump to an authorized
Honda servicing dealer for repair.
Possible Cause Correction
Strainer clogged Clear strainer (page 5).
Restriction or foreign
material in pump casing
Clear restriction (page 5).
Suction hose clamps loose Tighten hose clamps (page 5).
Suction hose sealing
washer not installed
Install suction hose sealing
washer (page 5).
Suction hose or suction
hose nipple face damaged
Replace damaged parts (page 5).
Suction head is too high Locate pump at appropriate level
(page 19).
Pump requires priming Prime the pump (page 5).
Debris under the clappet
valve or damaged clappet
valve
Remove debris or replace clappet
valve (page 13).
Diaphragm is torn Replace diaphragm (page 13).
Pump still does not pump Take the pump to an authorized
Honda servicing dealer for repair.
MODEL NAME
AND FRAME
SERIAL NUMBER
ENGINE
SERIAL
NUMBER