Honda Marine BF135A, Руководство пользователя

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13-9
• PISTON RING THICKNESS
1) Check the piston ring for damage (scores, scratches, etc.).
2) Measure the piston ring thickness.
• PISTON RING SIDE CLEARANCE
Set the piston ring on the piston properly so it is almost flush
with the piston outer surface. Measure the piston ring side
clearance.
[1]
TOP
[2]
SECOND
[3]
OIL
[1]
PISTON RING
[2]
END GAP
15 – 20 mm
(0.6 – 0.8 in)
STANDARD SERVICE LIMIT
TOP
1.170 – 1.185 mm
(0.0461 – 0.0467 in)
SECOND
1.175 – 1.190 mm
(0.0463 – 0.0469 in)
STANDARD SERVICE LIMIT
TOP
1.23 – 1.24 mm 1.25 mm
(0.0484 – 0.0488 in) (0.0492 in)
SECOND
1.24 – 1.25 mm 1.25 mm
(0.0488 – 0.0492 in) (0.0492 in)
OIL
2.005 – 2.025 mm 2.05 mm
(0.0789 – 0.0797 in) (0.081 in)
STANDARD SERVICE LIMIT
TOP
0.045 – 0.070 mm 0.13 mm
(0.0018 – 0.0028 in) (0.005 in)
SECOND
0.040 – 0.065 mm 0.13 mm
(0.0016 – 0.0026 in) (0.005 in)
The oil rings are the combination rings. Replace the top ring,
second ring and the oil rings as a set when either top or second
ring needs replacement.
STANDARD SERVICE LIMIT
TOP
0.20 – 0.35 mm 0.6 mm
(0.008 – 0.014 in) (0.02 in)
SECOND
0.50 – 0.65 mm 0.75 mm
(0.020 – 0.026 in) (0.030 in)
OIL
0.20 – 0.70 mm 0.8 mm
(0.008 – 0.028 in) (0.031 in)
If the end gap is larger than the service limit, install a new
piston ring and recheck. Check the cylinder sleeve I.D. (P. 13-8).
The oil rings are the combination rings. Replace the top
ring, second ring and the oil rings as a set when either top
or second ring needs replacement.
• PISTON RING GROOVE WIDTH
1) Check the piston ring grooves for uneven wear, damage
and clogged oil hole.
2) Measure the piston ring groove width.
• PISTON RING END GAP
Use the piston to push the piston ring into the cylinder and
position it horizontally at 15 to 20 mm from the bottom of the
cylinder.