Kubota WG1605 Service Training page 92

Engine Mechanical Damage
If the engine is mechanically damaged it
will not move O
ring damage, valve not sealing)
 This will cause a low O2 condition in the exhaust
and the ECU will react by SUBTRACTING fuel in
the CL-BM program (if in closed loop operation)
Fuel pressure problems can cause the
system to go rich or lean also
 VERIFY CORRECT FUEL PRESSURE (ALSO
VOLUME)
properly (i.e. piston or
2
KUBOTA ENGINE AMERICA
Service Training