Yamaha E70 Owners Manual

Operation
65
EMU27885
Adjusting trim angle (Power trim and 
tilt)
WA R N I N G
EWM00753
●Be sure all people are clear of the out-
board motor when adjusting the trim
angle. Body parts can be crushed be-
tween the motor and the clamp bracket
when the motor is trimmed or tilted.
●Use caution when trying a trim position
for the first time. Increase speed gradu-
ally and watch for any signs of instabil-
ity or control problems. Improper trim
angle can cause loss of control.
●If equipped with a power trim and...

Operation
66
To lower the bow (trim-in), press the switch
“ ” (down).
Make test runs with the trim set to different
angles to find the position that works best for
your boat and operating conditions.
EMU27912
Adjusting boat trim
When the boat is on plane, a bow-up attitude
results in less drag, greater stability and effi-
ciency. This is generally when the keel line of
the boat is up about 3 to 5 degrees. With the
bow up, the boat may have a greater tenden-
cy to steer to one side or the other. Compen-...

Operation
67
WA R N I N G
EWM00222
Make sure that no one is near the out-
board motor when tilting the outboard
motor up or down. Otherwise, body parts
could be crushed between the outboard
motor and the clamp bracket.
WA R N I N G
EWM00250
Leaking fuel is a fire hazard. If there is a
fuel joint on the outboard motor, discon-
nect the fuel line or close the fuel cock if
the engine will be tilted for more than a
few minutes. Otherwise fuel may leak.
NOTICE
ECM00241
●Before tilting the outboard motor,...

Operation
68
3. Pull the tilt support lever toward you to
support the engine. WARNING! After
tilting the outboard motor, be sure to
support it with the tilt support knob or
tilt support lever. Otherwise the out-
board motor could fall back down
suddenly if oil in the power trim and
tilt unit or in the power tilt unit loses
pressure.
 [EWM00262] NOTICE: Do not use
the tilt support lever or knob when
trailering the boat. The outboard mo-
tor could shake loose from the tilt
support and fall. If the motor...

Operation
69
EMU28061
Shallow water
EMU32851
Power trim and tilt models
The outboard motor can be tilted up partially
to allow operation in shallow water.
NOTICE
ECM00260
Do not tilt the outboard motor up so that
the cooling water inlet on the lower unit is
above the surface of the water when set-
ting up for and cruising in shallow water.
Otherwise severe damage from overheat-
ing can result.
EMU32913
Procedure for power trim and tilt models
1. Place the remote control lever / gear
shift lever in...

Operation
70
3. To return the outboard motor to the nor-
mal running position, press the power
trim and tilt switch and slowly tilt the out-
board motor down.
EMU35391
Cruising in other conditions
Cruising in salt water
After operating in salt water, flush the cooling
water passages with fresh water to prevent
them from becoming clogged. Also rinse the
outside of the outboard motor with fresh wa-
ter.
Cruising in muddy, turbid, or acidic water
Water in some areas can be acidic or with a
lot of sediment...

71
Maintenance
EMU41510
Transporting and storing 
outboard motor
WA R N I N G
EWM02620
●USE CARE when transporting fuel tank,
whether in a boat or car.
●DO NOT fill fuel container to maximum
capacity. Gasoline will expand consid-
erably as it warms up and can build up
pressure in the fuel container. This can
cause fuel leakage and a potential fire
hazard.
●Leaking fuel is a fire hazard. When
transporting and storing the outboard
motor, disconnect the fuel line from the
outboard motor to prevent fuel...

Maintenance
72
the sump, keep the outboard motor in
the attitude shown when transporting
and storing it. If storing or transporting
the outboard motor on its side (not up-
right), put it on a cushion after draining
the engine oil.
●Do not place the outboard motor on its
side before the cooling water has
drained from it completely, otherwise
water may enter the cylinder through
the exhaust port and cause engine trou-
ble.
●Store the outboard motor in a dry, well-
ventilated place, not in direct sunlight....

Maintenance
73
silencer or the fogging hole of the silenc-
er cover, if equipped. When properly
done, the engine will smoke excessively
and almost stall.
8. Remove the flushing attachment and
wipe off any excess water.
9. Install the top cowling and propeller.
10. Drain the cooling water completely out of
the motor. Clean the body thoroughly.
TIP:
A flushing attachment is available from your
Yamaha dealer.
EMU28402
Lubrication
1. Install the spark plug(s) and torque to
proper specification. For...

Maintenance
74
2. Screw the garden hose adapter onto a
garden hose, which is connected to a
fresh water supply, and then connect it
to the garden hose connector.
3. With the engine off, turn on the water tap
and let the water flush through the cool-
ing passages for about 15 minutes. Turn
off the water and disconnect the garden
hose adapter from the garden hose con-
nector.
4. Reinstall the garden hose connector
onto the fitting on the bottom cowling.
Tighten the connector securely.
NOTICE: Do not leave...