1994 Johnson/Evinrude Outboards 40 thru 55 Service Manual, Page 84Get this manual

1994 Johnson/Evinrude Outboards 40 thru 55 Service Manual, Page 84

Testing Purpose The following procedure is designed to help you isolate defecsystemtive component in the boat or engine The
and fitting, carefully cut the hose along its side and peel it back to avoid damaging the fittings r:;-] 2Install OMC Vacuum
Gauge, PIN 390954or equivalent, in(20,3 cm) of clear vinyl hose atthe fuel inlet fitting on the lower engine coverSecure
all connections with tie straps to eliminate air leakage r:::-::J Do not use fuel primer bulb, manual fuel primer pump, or
electric fuel primer pump to restart engineFuel system pressure could cause immediate damage to vacuum gauge3Start engine
and run at full throttle for at least two minutesMonitor clear vinyl hose for signs of air or vapor bubbles and note reading
on vacuum gauge4The vacuum gauge reading must not exceed inof mercury (Hg) at any timeThere should be no air or vapor bubbles