Yanmar 3TNV Series Service Manual page 132

Point 3
[Disassemble]
There is an acoustic material part to name as fuel pump spacer between the fuel pump and the
cylinder block. Loosen fuel pump installation bolts with a closed wrench when disassembling a fuel
pump.
[NOTICE]
An intake manifold may obstruct the disassembly of the fuel pump by the engine model. Remove
the fuel pump after removing the intake manifold first.
[Reassemble]
When installing a fuel pump on the gear case, put a fuel pump spacer between the cylinder blocks,
and install it .
117
7. Fuel Injection Pump/Governor