ENGINE
PB-8010, EB810
48
7-4 Testing crankcase and cylinder sealings
1. Loosen two bolts.
2. To seal intake port and crankcase pulse pas-
sage, install pressure rubber plug 91041 (A1)
between carburetor and carburetor insulator.
3. Loosen muffl er bolts. And to seal exhaust port,
insert pressure rubber plug 91041 (A2) between
muffler gasket and exhaust port of muffler as
shown. Then retighten muffl er bolts.
4. Remove spark plug and install pressure connec-
tor A131-000160 (B) to spark plug hole.
5. Connect pressure/vacuum tester 91149 (C) to
pressure connector (B).
6. Apply negative pressure approx. 30 kPa (0.3
kgf/cm2) (4.4 psi) by pressure tester and leave for
30 seconds.
7. If the reading drops, leakage may occur from oil
seal. Inspect oil seal for damage or wear.
8. Then, apply pressure approx. 50 kPa (0.5 kgf/
cm2) (7.3 psi) by pressure tester and leave for 30
seconds.
9. If the reading drops, leakage may occur.
10. Leakage may occur from crankcase seam or
oil seal. Use soapy water to locate leakage.
B
B
A1
A2
C
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