Honda HRS216PKA Manual page 95

CAM PULLEY/CRANKSHAFT/PISTON/
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 combustion chamber cleaning brush
(commercially available) to an electric drill and clean the
combustion chamber.
Be sure to insert thick paper into the cylinder to protect the
inner wall of the cylinder during cleaning of the combustion
chamber.
Do not press the cleaning brush with force against the
combustion chamber.
VALVE SEAT RECONDITIONING
Valve Seat Inspection
1. Thoroughly clean the combustion chamber and valve seats
to remove carbon deposits using the procedure shown
above.
2. Apply a light coat of Prussian Blue compound or erasable
felt-tipped marker ink to the valve faces.
3. Insert the valves, and then lift them and snap them closed
against their seats several times. Be sure the valve does
not rotate on the seat.
The transferred marking compound will show any area of
the seat that is not concentric and may require valve seat
reconditioning.
9-10
HRS216PKA • HRS216SKA • HRS216VKA
THICK PAPER OR
EQUIVALENT
ELECTRIC
DRILL
VALVE FACE