COOLANT SYSTEM
Coolant Pump Components and Functions
7-12 6LY3 Service Manual
© 2007 Yanmar Marine International
Measuring the Coolant Pump Clearances
1. Push the impeller all the way toward the
pump body and insert a thickness gauge
(Figure 7-9, (1)) diagonally between the
impeller and the body to measure the clearance
between the two.
Figure 7-9
Figure 7-9
1 – Thickness Gauge
2. Place a straightedge (Figure 7-10, (1)) against
the end of the pump body and insert a
thickness gauge (Figure 7-10, (2)) between the
impeller and the plate (pump body bracket) to
measure the clearance between the two.
Figure 7-10
Figure 7-10
1 – Straight Edge
2 – Thickness Gauge
0006208
(1)
0006209
(2)
(1)
Coolant Pump Clearances
Standard Limit
Clearance Between
the Impeller and
Pump Body
0.3-1.1 mm
(0.011-0.043 in.)
1.5 mm
(0.059 in.)
Clearance Between
the Impeller and Plate
1.5 mm
(0.059 in.)
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