Yanmar 3YM30 Sevice Manual page 113

(24) Mounting the fresh water pump
1) Thoroughly coat both sides of the gasket with
adhesive.
2) Renew the O-ring for the connecting part of the
pump, which is inserted in the cylinder block, and
tighten the fresh water pump.
(25) Mounting the fuel injection pipe and fuel
return pipe
1) Mount the fuel injection pipe and then assemble
the fuel injection pipe retainer to prevent the pipe
vibration.
NOTE:
Lightly tighten the pipe joint nuts on both ends of
the fuel injection pipe. Completely tighten after
adjusting the injection timing.
Standard tightening torque
fuel injection pipe joint nut
2) Mount the fuel return pipe with the clamp (fuel
injection nozzle-fuel injection pump).
NOTE:
When tightening the fuel return pipe to fuel
injection nozzle, tighten the nut with holding the
return pipe by hand so that the pipe may not break.
(Refer to 4.3.1(13).)
N•m (kgf•m)
29.4-34.4 (3.0-3.5)
98
4. Disassembly and reassembly
Cylinder head
Gasket
O-ring
Fuel injection pipe retainer
Fuel injection pipe
Fuel injection pump
Fuel return pipe
Fuel injection
nozzle
Fresh water pump
No. 3
No. 2
No. 1