13. FUEL RETURN VALVE (Pre-1972 only)

Function

The function of the fuel return valve is to eliminate gasoline vapor locks. It does this by allowing unused fuel to return to the tank.

1972 models have an orifice hole for constant return which is automatic and requires no adjustments.

Adjustment (Pre-1972)

1. Slowly accelerate while watching return valve pin. At 2,000 RPM the pin should be fully lifted. (See Fig. 1)

2. Adjust at spring tension adjusting screw. (See Fig 2)