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ENGINE -
Engine
For disassembly. assembly. inspection. cleaning and ad-
justments. refer to the GP338F/GP433F Servide Manual.
Observe the following points carefully.
(1) Remove the cylinder heads.
Each head
is
held
down by four nuts and four bolts.
Break each nut loose. in pattern. before removing
completely.
(Fig.
2-50)
Fig
.
2-50
Note:
On reassembly. the head bolts are torqued. gradually
and in a
cross-hatch
pattern.
A:
16.6
-
19.5 ft-Ibs.
(2.3
-
2.7 m-kgs.)
B:
14.5
-
16.6 ft-Ibs.
(20
-
2.3
m-kgs.)
(Fig. 2-51)
Fig
.
2-51
(2)
When installing both right and left cylinders. the in-
take port flanges must be lush with each other.
If
not. the
throttle
valve and
choke
valve will not oper-
ate smoothly.
(Fig. 2-52)
Fig. 2-52
(3) Crankshaft run-out can be checked by placing the
crankshaft
ends in V-blocks.
By using a dial indicator the deflection of the crank-
shaft should be measured at the places shown.
(Fig.
2-53)
0.05 mm.
<
Deflection>
2.36~g.02
ins.
~cr---I
+0
(60_ 0 . 05
mm.l
7.01
±
0.004 ins.
(178
±
0.1 mm.l
Width of assembled
crankshaft
Fig. 2-53
-
28-
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