Yamaha EF1400 Owner's Manual page 9

CAUTION;
This engine is not filled with oil at the factory,
so be sure to fill it before operating the engine,
or
the engine will be seriously damaged.
NOTE: -
Be sure the engine is
level when
checking
the
oil.
G-300
Oil warning device
When the engine oil level lowers, the engine stalls
automatically. Should it stall, pull the starter han¬
dle and the oil warning lamp will light.
CAUTION:----— -
Should the engine
stall abruptly, pull the starter
handle and if the oil warning lamp lights, the
engine oil is insufficient. Add oil and start
operation.
X-336
(2)Oil warning switch