FUEL SYSTEM
Fuel Injection Pump / Governor / Timer
12/05
6LY3 Service Manual
6-11
© 2007 Yanmar Marine International
Timer Components and Functions
Timer Components
The 6LY3 series engine utilizes an electro-hydraulic
timer. The timer consists of a piston, a cylinder and
a cam drive coupling. The piston has helical spline
outside and straight spline inside, as illustrated in
Figure 6-6. The cylinder (Figure 6-6, (6)) has
helical splines inside and oil passages to move the
piston. The cam drive coupling (Figure 6-6, (9))
has a straight spline outside and drives the pump
camshaft.
Figure 6-5
Figure 6-5
Figure 6-6
Figure 6-6
1 – Electromagnetic Valve
2 – Helical Spline
3–Piston
4 – Straight Spline
5 – Cam Tightening Nut
6–Cylinder
7 – Pump Drive Gear
8 – Pump Camshaft
9 – Cam Drive Coupling
0005668
0005669
(6)
(1)
(7)
(2)
(3)
(4)
(9)
(8)
(5)
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