Important

After reassembly, chain housing must be air tight. Check using Vacuum Gauge, Part No. 96950-68. Remove one of the four screws securing the front chain inspection cover and in its place screw in the threaded fitting of the gauge. Then, with engine running, check gauge to see that there is a reading indicating 20 inches water pressure or more at 1500 rpm. Perform check with vent hose to tank pinched closed with a pliers. A lower reading indicates an air leak into chain housing either at gasket, solenoid, starter shaft, or hoses.

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