ITIOWS AFFECTING
OPERATION
FUEL MIXTURE
and
GASOLINE/
OIL RECOMMENDATIONS
AWARNING
USE CARE when transporting fuel con
-
tainer, whether in a boat or car. DO NOTfill
fuel container to maximum capacity. Gaso
-
line will expand considerably as it warms
up and can build up pressure in the fuel
container. This can cause fuel leakage and
a potential fire hazard.
AWARNING
FIRE AND EXPLOSION HAZARD: Fuel
leakage from any part of the fuel system
can be a fire and explosion hazard which
can cause serious bodily injury or death.
Careful
perr~dic inspection of the entire
fuel system
IS
mandatory, particularly after
storage. All
t
el
components including fuel
tanks, whether plastic, metal or fiberglass,
fuel lines,
pr*mer bulbs, fittings, fuel filters
and carburetors should be inspected for
leakage, softening, hardening, swelling or
corrosion.
Aoy sign of leakage or deterio
-
ration nece.isitates replacement before
further
engire operation.
WEIGHT DISTRIBUTION
p
oaitioning
-'
of weight (passengers and
gorir) inside the boat hds the following
i:fftxts:
A
Shifting weight to real (stern).
s
G~inerally Increases speed and engine
RPlll.
@
At extremes, can cause boat to porpoise.
Causes bow to bounce in choppy water.
e
Increases danger of the following
-
wave
splashing into boat when coming off plane.
R.
Shifting weight to front (bow).
e
Improves ease of planing off.
Iniproves rough water ride.
c
At extremes, can cause boat to veer back
and forth (bow steer).
s
Reduces engine RPM.
GEAR HOUSING
If outboard is not tilted up when boat is
docked, marine vegetation may accumu
-
late. This growth MUST BE REMOVED
before operation;
it may clog water inlets
and cause engine to overheat.
CAVITATION
Cavitation occurs when water flow cannot
follow the contour of afast
moving under
-
water object, such as a gear housing or
propeller. Cavitation permits the propeller
to speed up, but the boat speed to reduce.
Cavitation can seriously erode the surface
of the gear housing or propeller. Common
causes of cavitation are:
GASOLINE RECOMMENDATIONS
ACAUTION
Use of improper gasolines and/or oils can
cause serious damage to your outboard
motor.
Because of
the possible adverse effects of
alcohol in gasoline, it is recommended that
only alcohol
-
free gasoline be used where
possible. If only alcohol
-
containing fuel is
available, or if the presence of alcohol is
unknown, then increased inspection fre
-
quency for leaks and abnormalities is
required.
Any leaded or unleaded (lead
-
free) gaso
-
line, with a minimum posted octane rating
of
87 (research octane number 90) is satis
-
factory for use in these model outboard
motors.
A.
Bent propeller blade or damaged gear
housing skeg.
B.
Raised burrs of sharp edges on pro
-
peller or gear housing.
However, gasolines containing alcohol,
either methyl alcohol (methanol) or ethyl
(ethanol) may cause increased:
C. Weeds or other debris snagged on pro
-
peller or gear housing.
OIL RECOMMENDATIONS
Corrosion of
metal parts
VENTILATION
ACAUTION
The use of other than recommended gaso
-
line and Quicksilver 2
-
Cycle Outboard Oil
or an acceptable NMMA TC
-
W 11'" oil may
cause piston scoring, bearing failure or
both. DO NOT, under any circumstances,
use multi
-
grade or other highly detergent
automobile oils or oils which contain
metallic additives.
Deterioration of elastomer and plastic
parts.
Ventilat~on is caused by surface air or
exhaust gases which are introduced
around the propeller resulting in propeller
speed
-
up and a reduction in boat speed.
Excessive ventilation is annoying and
usually caused by:
BOTTOM OF BOAT
Fuel permeation through flexible fuel
lines.
To
maintain maximum speed the following
conditions of the boat bottom should be
observed:
Wear and damage of internal englne
parts.
A. Outboard installed too high on tran
-
som.
Starting and operating difficulties
A.
Clean, free of barnacles and marine
growth.
Some of these adverse effects are due to
the tendency of gasolines containing alco
-
hol to absorb moisture from the air, result
-
ing in a phase of water and alcohol separat
-
ing from the gasoline in the fuel tank.
In an emergency, if Quicksilver 2
-
Cycle
Outboard Oil is not available, substitute
a
high quality 2
-
cycle oil that is intended for
outboard use and meets
NMMA
rating
TC
-
W
II'", shown on oil container. Use the
oil manufacturer's recommended
gasoline-
oil mixture as shown on the label, not to
exceed
50:l
B. Outboard tilted out too far.
B.
Free of dtstort~on, nearly flat where it
contacts the water.
C. A missing propeller diffuser ring
D. Damaged propeller or gear housing
which allows exhaust gases to escape
C.
Straight and smooth, fore and aft
between propeller and gear housing The adverse effects of alcohol are more
severe with methyl alcohol (methanol) and
are worse with increasing alcohol content.
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