Measuring Fuel Pressure - TOHATSU MFS25 Service Manual

5) Measuring fuel pressure

Remove cap 1.
1.
Connect pressure gauge 2 as shown.
2.
• Before connecting pressure gauge, cover
connection between pressure gauge and
valve with clean and dry cloth to prevent
fuel from releasing.
• Connect pressure gauge securely.
Pressure Gauge Ass'y :
P/N. 3T5-72880-0
Before measurement, check that pressure
relief valve is fully closed.
3. Start engine run 5 minutes to warm up, and then measure
fuel pressure. If the pressure is below specified value, check
high pressure fuel passage and vapor separator.
• Before measurement, be sure to check
that pressure relief valve is fully closed.
• Do not open pressure relief valve during
measurement. Opening the valve allows
fuel to spew out, possibly causing fire.
• After measurement, cover hose tip with
rag, and open pressure relief valve to
drain fuel from discharge hose and the
instrument.
• Before storing pressure gage, fully close
pressure relief valve.
Fuel Pressure (Reference) :
0.29 MPa ( 43 psi ) [ 3.0 kgf/cm
• Use 3AC diagnosis system when measuring
fuel pressure without operating engine.
• If engine cannot be started, crank 4 to 5
revolutions by using starting motor or recoil
starter to measure fuel pressure.
25/30 2006
WARNING
WARNING
WARNING
2 ] ±10%
1
2
4-29
4