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Yamaha 4AC User Manual

Yamaha 4AC
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Specifications and requirements
13
does not recommend gasohol containing
methanol because it can cause fuel system
damage or engine performance problems.
EMU36880
Muddy or acidic water
Yamaha strongly recommends that you have
your dealer install the optional chromium-plat-
ed water pump kit if you use the outboard mo-
tor in muddy or acidic water conditions.
However, depending on the model it might not
be required.
EMU36330
Anti-fouling paint
A clean hull improves boat performance. The
boat bottom should be kept as clean of marine
growth as possible. If necessary, the boat bot-
tom can be coated with an anti-fouling paint
approved for your area to inhibit marine
growth.
Do not use anti-fouling paint which includes
copper or graphite. These paints can cause
more rapid engine corrosion.
EMU36341
Motor disposal requirements
Never illegally discard (dump) the motor.
Yamaha recommends consulting the dealer
about discarding the motor.
EMU36351
Emergency equipment
Keep the following items onboard in case
there is trouble with the motor.
A tool kit with assorted screwdrivers, pliers,
wrenches (including metric sizes), and
electrical tape.
Waterproof flashlight with extra batteries.
An extra engine shut-off cord (lanyard) with
clip.
Spare parts, such as an extra set of spark
plugs.
Consult your Yamaha dealer for details.
U6E028E0.book Page 13 Tuesday, February 10, 2009 3:19 PM

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Yamaha 4AC Specifications

General IconGeneral
Fuel Induction SystemCarburetor
Starting SystemManual
Gear Ratio2.08:1
Engine Type2-stroke
Prop Shaft Horsepower / Max. Output / Max Power4 hp
Full Throttle RPM Range4, 500 - 5, 500 rpm
Ignition SystemCDI
Lubrication SystemPremix
Gear ShiftF-N
Shaft LengthS

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