Jet Valve, Adjust

The jet valve must be adjusted before adjusting the intake valve.
Following procedure for intake and exhaust valve adjustment, position No. 1 cylinder at top dead center compression stroke. Loosen intake valve adjusting screw at least 2 turns, then loosen jet valve adjusting screw locknut. Rotate jet valve adjusting screw counterclockwise and insert specified feeler gauge blade between jet valve stem and adjusting screw. Tighten jet valve adjusting screw until it contacts the feeler gauge blade, then while holding adjusting screw in position, tighten locknut. After jet valve adjustment has been completed, adjust intake valve clearance. Continue to follow intake and exhaust valve adjustment procedure and adjust jet valves as necessary.