Honda GX270H Manual page 137

62Z7B000.book 6 ページ ２０１２年９月２７日 木曜日 午前１０時２１分
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CYLINDER HEAD/VALVES
VALVE GUIDE I.D.
Ream the valve guide [1] to remove any carbon
deposits before measuring.
TOOL:
Valve guide reamer, 6.612 mm [2] 07984-ZE20001
Turn the special tool (Valve guide reamer) clockwise,
never counterclockwise.
Continue to rotate the special tool while removing it
from the valve guide.
Measure and record each valve guide I.D.
GX270H:
STANDARD:
6.600 – 6.612 mm (0.2598 – 0.2603 in)
SERVICE LIMIT:
GX390H1:
STANDARD:
6.600 – 6.615 mm (0.2598 – 0.2604 in)
SERVICE LIMIT:
If the measured valve guide I.D. is more than the
service limit, replace the valve guide (page 13-8).
VALVE FACE
Inspect each valve for face irregularities.
If necessary, replace the valve (page 13-4).
13-6
6.66 mm (0.262 in)
6.66 mm (0.262 in)
HANDLE
(Commercially
available)
[2]
COMBUSTION
CHAMBER SIDE
[1]
VALVE SPRING
SIDE
VALVE FACE