TOHATSU MD 30B2 Service Manual page 110

Fuel System (TLDI)
11) Inspection of Fuel Pump
1. Remove fuel hoses (2) from fuel pump.
Catch fuel that spills when the hoses are
removed.
2. Connect vacuum/pressure gauge to inlet of fuel pump.
Fill fuel pump with 20:1 gasoline-oil mixture.
3. Close fuel pump outlet with a finger and apply specified
pressure. Check if no air leaks through diaphragm.
Vacuum/Pressure Gauge :
P/N. 3AC-99020-0
Specified Pressure :
0.05 MPa (7 psi) [0.5 kgf/cm
4. Apply specified vacuum pressure to check that no air leaks
through check valve located in the fuel pump.
Specified Vacuum Pressure :
-0.03MPa (-4 psi) [-0.3 kgf/cm
5. Connect vacuum / pressure gauge to outlet of fuel pump.
6. Apply specified pressure to check that no air leaks through
check valve located in the fuel pump. Replace fuel pump if
necessary.
Air-tightness of fuel pump can be increased by
making the interior wet with gasoline.
Specified Pressure :
0.03 MPa (4 psi) [0.3 kgf/cm
4-30
CAUTION
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TLD D30/40/50B2 2013