Honda EU30i Manual page 54

ENGINE SPEED DOES NOT INCREASE OR STABILIZE
Check the air cleaner element (page 3-4).
Not clogged
Turn the engine switch knob to the ON position,
and confirm if the choke lever is fully opened.
Fully open
Check the valve clearance (page 3-7).
Normal
Remove the spark plug and check the electrodes
for carbon and proper gap (page 3-5).
Normal
Check the main jet for blockage (page 6-15).
Normal
Check for secondary air entering. Is it normal?
Yes
Check the cylinder compression (page 14-5).
Normal
Go to page 4-8
Clogged
Clean the air cleaner element (page 3-4).
Not fully open
Adjust the choke cable (page 6-19).
Abnormal
Adjust the valve clearance (page 3-7).
Abnormal
Inspect the spark plug and adjust the spark plug
gap (page 3-5). Replace if necessary (page 3-6).
Clogged
Disassemble and clean the carburetor (page 6-15
and 21).
No
Check around the air intake joint and carburetor,
replace the insulator and/or gasket if necessary.
High cylinder
compression
Check for carbon deposits in the combustion
chamber (page 14-3).
Low cylinder
compression
•Check the valve clearance (page 3-7 ).
•Check that the cylinder head is correctly
tightened (page 14-3).
•Check for defective cylinder head gasket, valves
or valve seats (page 14-3, 4, 5 and 6).
•Check for worn piston, piston rings or cylinder
(page 15-5, 6, 7, 8 and 9).
TROUBLESHOOTING
4-7