Fuel Feed Pump; Construction Of Fuel Feed Pump; Fuel Feed Pump Specifications - Yanmar 3YM30 Sevice Manual

6.2 Fuel feed pump

The fuel feed pump feeds fuel from the fuel tank,
passes it through the fuel filter element, and supplies it
to the fuel injection pump.
The fuel feed pump is mounted on the side of this
engine and is driven by the (eccentric) cam of the fuel
pump camshaft. It is provided with a manual priming
lever so that fuel can be supplied when the engine is
stopped.

6.2.1 Construction of fuel feed pump

2 5 4 7
6
3
1
1. Bottom body
2. Piston spring
3. Piston
4. Diaphragm spring
5. Diaphragm assembly

6.2.2 Fuel feed pump specifications

Head
Discharge volume
Closed off pressure
8 9 10 11 12 13 14
6. Pin
7. Lever return spring
8. Lever assembly
9. O-ring
10. Stop pin
1m
3
230 cm /min at 1500 min
discharge pressure of 0.020 MPa (0.2 kgf/cm
2)
0.029 MPa (0.3 kgf/cm
-1
at 400 min (cam)
To fuel filter
From fuel tank
Fuel feed pump
11. Top body assembly
12. Packing
13. Cover
14. Small screw
15. Cap
-1
(cam),
2)
or more
144
6. Fuel injection equipment
Fuel injection pump
Packing
15