Yamaha EF1400 Owner's Manual page 22

J-050
Engine oil replacement
The engine oil should be replaced after the first 20
hours of operation and thereafter every 150 hours.
To replace the oil, first warm up the engine for 2 or
3 minutes, stop engine and remove the oil filler
plug and oil drain plug so that the oil can be com¬
pletely drained.
After draining the oil, install the oil drain plug, and
fill oil until the oil begins to overflow the oil filler.
Oil capacity:
EFI400
EF2000
EF2800
: 500cc/0.53
:680cc/0.72
:950cc/1.00
US qt/0.44
US qt/0.61
US qt/0.84
IMPqt
IMP qt
IMPqt
X-310
v
1 Oil drain plug
X-315
2 Oil filler cap
19-