Owner’s Manual for Water Pump
15
Troubleshooting Procedures
Cleaning The Impeller
See Figure 4-7. The impeller (A) is located
inside the volute casing (B). If the impeller is
blocked with debris, remove the four mounting
screws (C) to detach the pump from the
engine. Remove debris from the impeller.
NOTE: It is not necessary to remove the
impeller for cleaning.
Figure 4-7. Cleaning the Impeller
Correcting Suction Problems
NOTE: Leaking air at the suction side of
the pump may cause weak or non-existent
discharge flow.
To check for air leaks:
1. Disconnect the suction hose.
2. Prime the pump with water and start the
engine.
3. See Figure 4-8. Hold a sheet of cardboard
against the suction port and wait 30
seconds.
Figure 4-8. Testing for Suction
NOTE: If you feel suction against the
cardboard, the pump is operating
correctly, but there is a problem with the
suction hose or the suction hose
connection.
See Figure 4-9. Verify suction hose is not flat
anywhere along its length (A). Holes or cracks
(B) will also affect suction. Finally, confirm that
the suction hose is connected correctly, with
the coupling packing (C) installed.
Figure 4-9. Common Suction Hose Faults
000679
C
B
A
000862
000681
C
B
A
