Honda HHT25S Manual page 101

CRANKSHAFT / PISTON / VALVES / CYLINDER BLOCK
COMBUSTION CHAMBER CLEANING
1. Prepare a cylinder of thick paper or equivalent material, with a
diameter large enough to fit against the inner wall of the cylinder,
and insert it into the cylinder for protection.
2. Attach a commercially available cleaning brush to an electric drill
and clean the combustion chamber.
NOTICE
• Clean the combustion chamber with the valves installed in the
cylinder block.
• Be sure to insert thick paper into the cylinder to protect the
inner wall of the cylinder during cleaning.
• Do not press the cleaning brush with force against
the combustion chamber.
9-10
ELECTRIC
DRILL
Thick paper
or equivalent.
HHT25S•HHT35S
CLEANING BRUSH
(commercially
available)