Subaru Robin PKX201 - Manual (Page 58)

Trash Pumps - PKX Service
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63. Before running check the oil and pull the engine over
with the recoil rope to make sure nothing is binding in
the pump.
64. Fill the with prime water, start the engine. After warm
up run engine at full throttle and check the vacuum
with the vacuum tester to make sure no leaks
have developed. A vacuum of 20 to 25 lbs at sea level
should be read. This reading should be obtained within
5 seconds.
62. Apply a thread sealant the the six cover bolts as in
step 54. After lightly tightening the six bolts that hold
the intake nozzle to the pump housing, torque to the
specifi ed value of 4 to 6 ft. lbs.
61. The picture show the correct way to install the intake
nozzle
gasket.