ENGINE
58
CS-2511WES
251Ws
8-4 Testing crankcase and cylinder sealings (continued)
7. Open cap cover and remove spark plug.
8. Install pressure connector A131-000160 (K) to
spark plug hole (L).
9. Connect suitable pipe (inner dia. 4mm) (M)
between pressure connector (K) and pressure/vac-
cum tester 91149 (N) as shown.
10. Apply pressure approx. 50 kPa (0.5 kgf/cm
2
)
(7.3 psi) by pressure/vaccum tester 91149 (N) and
leave for 30 seconds.
11. If the reading drops, leakage may occur.
12. Leakage may occur from crankcase seam or
oil seal. Use soapy water to locate leakage.
13. Then, apply negative pressure approx. 30 kPa
(0.3 kgf/cm
2
) (4.4 psi) by pressure/vaccum tester
91149 (N) and leave for 30 seconds.
14. If the reading drops, leakage may occur from
oil seal. Inspect oil seal for damage or wear.
15. Remove plate and plug (or plugs) from exhaust
port and intakeport after this inspection, and rein-
stall all the removed parts.
8-5 Removing engine block
1. Remove rear handle from the unit (Refer to
9-3
Replacing rear handle and springs
).
2. Remove spark plug, cultch parts, oiler cover,
worm gear, circular washer, auto-oiler assembly,
ignition coil and flyweel .
3. Remove three bolts (A) from engine cover.
K
L
M
N
A
A
