Honda HHT25S Manual page 22

HHT25S•HHT35S
POOR PERFORMANCE AT LOW SPEED
Check the air cleaner element
Not restricted
Check for a restricted spark arrester.
Normal
Remove the spark plug and check for
cracks, carbon on the electrodes, and
spark plug gap P. 3-11.
Normal
Inspect the fuel tube for kinking,
pinching, and cracks. Inspect the
carburetor for loose installation and air
leaks around the carburetor insulator.
Normal
Check the fuel filter P.
Not restricted
Check inside the carburetor for
abnormalities such as hard or stiff
diaphragms P. 5-3, P.
Normal
Measure the cylinder compression
P. 2-14.
Normal
Start the engine according to the
starting procedure.
P. 3-3.
3-14.
5-8.
Restricted
Clean the air cleaner element. Replace
if necessary
Plugged
Clean or replace as necessary
Abnormal
Adjust the plug gap; replace if chipped,
cracked, or fouled
• Straighten the fuel tube if it is bent or
Abnormal
• If the carburetor is loose, replace the
• Check the carburetor shroud and O-
Restricted
Clean the fuel filter. Replace if
necessary
Abnormal
Replace the faulty parts
Abnormal
• Check to see whether the valve
• Check for carbon deposits in the
• Check for worn piston, piston rings,
SERVICE INFORMATION
P. 3-3.
P. 3-11.
pinched. Replace if necessary
P. 3-14.
gaskets and tighten the nuts
securely.
ring for damage and proper
installation P. 5-3, P. 5-8.
P. 3-14.
P. 5-3,
clearance is correct P. 3-10.
combustion chamber.
or valve seats P. 9-6.
P. 3-12.
P. 5-8.
2-11