
PRODUCT OVERVIEW
BY Series Operation Manual 25
COMPONENT IDENTIFICATION
Left Side - 4BY
Figure 1, Figure 2, and Figure 3 illustrate
a typical version of a 4BY engine. Your
engine may have different equipment from
that illustrated.
Figure 1
1 – Engine Oil Dipstick
2 – Fuel Filter / Water Separator
3–E-Box Panel
4 – High Pressure Fuel Pump
Right Side - 4BY
Figure 2
1 – Zinc Anode
2 – Zinc Anode
3 – Exhaust / Water Mixing Elbow
4 – Coolant Drain Cock
5 – Heat Exchanger
6 – Seawater Pump
7 – Seawater Drain Cock
8 – Hydraulic Oil Cooler
9 – Water Drain Plug
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