Subaru Robin PKX201 - Manual (Page 15)

PTG109 Service
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44. After adding priming water and fuel, start the unit and
check with test vacuum plate to make sure there are
no vacuum leaks.
The recommended vacuum reading at sea level should
be 25 lbs of vacuum.
43. Pull the engine over by the start pull cord, making sure
nothing is binding in the pump.
42. Tighten the three outer bolts, making sure not to over
tighten. The gasket will be distorted and squeezed
when overtightening these bolts.
The recommend tightenting torque is 3.3 to 4.8 ft. lbs.
41. This picture shows the correct placement of the gasket
to the intake nozzle housing.