Counter Rotation Models; Start-In-Gear Protection; Engine Oil Requirements - Yamaha F250B Owner's Manual

Specifications and requirements
Your outboard motor came with a Yamaha
propeller chosen to perform well over a range
of applications, but there may be uses where
a different propeller would be more appropri-
ate.
Your Yamaha dealer can help you select the
right propeller for your boating needs. Select
a propeller that will allow the engine to reach
the middle or upper half of the operating
range at full throttle with the maximum boat-
load. Generally, chose a larger pitch propeller
for a smaller operating load and a smaller
pitch propeller for a heavier load. If you carry
loads that vary widely, chose the propeller
that lets the engine run in the proper range for
your maximum load but remember that you
may need to reduce your throttle setting to
stay within the recommended engine speed
range when carrying lighter loads.
For instructions on propeller removal and in-
stallation, see page 95.
x
-
1 2 3
1. Propeller diameter in inches
2. Propeller pitch in inches
3. Type of propeller (propeller mark)
EMU36310

Counter rotation models

Standard outboard motors rotate clockwise.
Counter rotation models rotate counterclock-
wise. Counter rotation models are typically
used in multiple motor setups and are marked
with an "L" on the gear case above the anti-
ventilation plate.
18
On counter rotation models, be sure to use a
propeller intended for counterclockwise rota-
tion. These propellers are identified with the
letter "L" after the size indication on the pro-
peller. WARNING! Never use a standard
propeller with a counter rotation motor, or
a counter rotation propeller with a stan-
dard motor. Otherwise the boat could go
in the direction opposite of that expected
(for example, reverse instead of forward),
which could lead to an accident.
For instructions on propeller removal and in-
stallation, see page 96 and 96.
EMU35140

Start-in-gear protection

Yamaha outboard motors or Yamaha-ap-
proved digital electronic control units are
equipped with start-in-gear protection de-
vice(s). This feature permits the engine to be
started only when it is in neutral. Always se-
lect neutral before starting the engine.
EMU31444

Engine oil requirements

Recommended engine oil:
YAMALUBE 4-M FC-W oil or 4-stroke
motor oil with a combination of the fol-
lowing SAE and API oil classifications
Engine oil type SAE:
10W-30 or 10W-40
Engine oil grade API:
SE, SF, SG, SH, SJ, SL
Total engine oil quantity (oil pan capaci-
ZMU04607
ty):
Without oil filter replacement:
With oil filter replacement:
If the recommended engine oil grades are not
available, select an alternative from the fol-
lowing chart according to the average temper-
atures in your area.
5.6 L (5.92 US qt, 4.93 Imp.qt)
5.8 L (6.13 US qt, 5.10 Imp.qt)
[EWM01810]