Warming Up The Engine - TOHATSU 40B2 Owner's Manual

50 ENGINE OPERATION

2. Warming up the engine

Before driving the boat, let the engine
run at low speed to let it warm and
allow the oil to circulate through the
engine. If the engine is not warmed
up beforehand, the engine life will
shorten greatly.
This outboard engine automatically
controls warm-up operation, namely,
it runs at a speed slightly higher
than idling just after it is started,
and it reverts to the normal running
at a preset speed after warm-up is
complete.
6
D u r i n g t h e w a r m - u p o p e r a t i o n ,
c o n f i r m t h a t c o o l i n g w a t e r i s
discharged from the check port and
idle port.
!
If cooling water is not discharged
and engine operation is continued,
the engine will overheat and damage
occur.
Idle port
Idle port
CAUTION
Cooling water
check port
30·40·50
Cooling water
check port
75·90·115
CAUTION
!
Be sure to stop engine immediately
if cooling water check port is not
discharging water, and check if cooling
water intake is blocked. Operating
engine could lead to overheating
potentially leading to engine damage.
Consult an authorized dealer if the
cause cannot be found.
■ Engine speed
Proper idle speed after warm-up
operation.
Clutch in (In gear) Clutch off (Out of gear)
700 rpm
700/800/900 rpm
CAUTION
!
Do not shift to "F" or "R" until turning
into proper idle speed.
Do not exceed the full-throttle engine
speed.
Wide-open throttle rpm range
5,150 5,850rpm
700 rpm
700/800/900 rpm