BOS / SAV EMISSIONS - 5F-1390-823225--1 1096
5. Connect the hose from the propane bottle valve
to the “Y”-Fitting.
6. With engine idling at normal operating tempera-
ture, press the propane flow button on the valve.
Slowly begin opening the propane metering
valve until maximum engine RPM is reached.
When too much propane is added, engine RPM
will decrease. “Fine tune” the metering valve to
obtain the highest RPM.
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a
b
a - Propane Flow Valve
b - Propane Metering Valve
7. With propane still flowing, adjust the idle speed
screw (not the mixture screws) to obtain 850
RPM. Again, “fine tune” the propane metering
valve to obtain the highest engine RPM. If there
has been a change in the maximum RPM, read-
just the idle speed screw to 850 RPM.
8. Release the propane flow valve and allow engine
speed to stabilize. Slowly adjust the mixture
screws by equal amounts, pausing between ad-
justments to allow engine speed to stabilize, to
achieve 775 RPM.
73722
9. Press the propane flow valve. Engine RPM
should increase to 850 RPM. If it does not, repeat
steps 5 thru 7.
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10. If after performing the above procedure several
times, the correct results can still not be obtained,
check the following:
• PVS not working properly.
• Incorrect float level.
• Vacuum leaks.
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