Honda HRG416C1 Manual page 69

dummyhead dummyhead
CRANKSHAFT/PISTON/VALVES
PISTON SKIRT O.D.
Measure and record the piston O.D. at a point 10 mm
(0.4 in) from the bottom of the skirt and 90 degrees to
the piston pin bore.
STANDARD:
SERVICE LIMIT: 55.85 mm (2.199 in)
If the measurement is less than the service limit,
replace the piston (page 10-10).
PISTON-TO-CYLINDER CLEARANCE
Subtract the piston skirt O.D. from the cylinder sleeve
I.D. to obtain the piston-to-cylinder clearance.
STANDARD:
SERVICE LIMIT: 0.085 mm (0.0033 in)
If the calculated clearance is more than the service limit,
replace the piston and recheck the clearance.
If the clearance is still more than the service limit with
the new piston, replace the cylinder.
PISTON RING WIDTH
Measure each piston ring width.
STANDARD:
Top:
Second:
SERVICE LIMIT:
Top:
Second:
If any of the measurements is less than the service
limit, replace the piston rings (top, second, oil) as a set
(page 10-10).
PISTON RING SIDE CLEARANCE
Measure the clearance between each piston ring and
ring groove of the piston using a feeler gauge.
STANDARD:
Top:
Second:
SERVICE LIMIT:
Top:
Second:
If the clearance is more than the service limit, replace
the piston rings (top, second, oil) as a set (page 10-10)
and recheck the clearance.
If the clearance is still more than the service limit with
the new piston rings, replace the piston (page 10-10).
10-14
55.970 – 55.990 mm
(2.2035 – 2.2043 in)
0.010 – 0.045 mm
(0.0004 – 0.0018 in)
0.935 – 0.950 mm
(0.0368 – 0.0374 in)
0.975 – 0.990 mm
(0.0384 – 0.0390 in)
0.890 mm (0.0350 in)
0.930 mm (0.0366 in)
0.055 – 0.089 mm
(0.0022 – 0.0035 in)
0.015 – 0.049 mm
(0.0006 – 0.0019 in)
0.190 mm (0.0075 in)
0.15 mm (0.006 in)
10 mm (0.4 in)