TOHATSU MFS 9.9 User Manual

5-43
4st 9.9/15/20 2008
UP
1
a
6
6
6
6
Do not reuse.
7. Remove piston pin clips 6 and piston pin, and then, piston.
Write cylinder number a on the mating piston.
Do not reuse piston pin clips. Be sure to replace
with new ones.
5
27) Inspection of Piston Outer Diameter
1. Measure piston outer diameter between points specified.
Replace if it is less than specified value.
Piston Outer Diameter a : Standard Value
60.96 mm (2.4000 in)
Measurement point b: on the line at right
angle to piston pin.
9mm (0.28 in) above piston skirt bottom
Functional Limit :
60.90 mm (2.3976 in)
a
b
d
e
D2
D4
D6
D1
D3
D5
a
b
c
28) Inspection of Cylinder Inner Diameter
1. Measure cylinder inner diameters (D1 to D6) at a, b and c
in crank shaft directions d (D1, D3 and D5 respectively),
and in crank web directions e (D2, D4 and D6 respectively).
2. Obtain taper through calculation described below. Replace
cylinder block if it is over specified value.
Note : Measure at the maximum wear points.
Cylinder Inner Diameters (D1 to D6) : Standard Value
61.00 mm (2.4016 in)
Functional Limit :
Replace if over 61.06 mm (2.4039 in).
Taper Limit :
D1-D5 (direction d)
D2-D6 (direction e)
Functional Limit :
0.06 mm (0.0024 in)
a 15mm (0.6in)
b 35mm (1.4in)
c 55mm (2.2in)
d Crankshaft direction
e Crank web direction
3. Obtain out-of-roundness through calculation described below.
Replace cylinder block if out-of-roundness is over specified value.
Out-of-roundness Limit :
D2-D1 (measuring point a)
D6-D5 (measuring point c)
Functional Limit :
0.06 mm (0.0024 in)
E_MFS20C_ch05_090105.qxd 09.1.20 5:25 PM ページ 43

TOHATSU MFS 9.9 Specifications

General

Brand	TOHATSU
Model	MFS 9.9
Category	Outboard Motor
Language	English