Mercury 30 User Manual

12
90-10212R40
GB
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FUEL & OIL
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GASOLINE RECOMMENDATIONS
United States and Canada
Use a major brand of automotive unleaded gasoline with a minimum posted octane
rating of 87. Mid-grade automotive gasolines that contain fuel injector cleaner are
preferred for added internal engine cleanliness. Leaded gasoline is not
recommended.
International
Use a major brand of automotive unleaded gasoline with a minimum posted octane
rating of 90RON. Automotive gasolines that contain fuel injector cleaner are
preferred for added internal engine cleanliness. Leaded gasoline is acceptable in
areas where unleaded gasoline is not available.
Alcohol in Gasoline
We do not recommend the use of gasoline which contains alcohol because of the
possible adverse effect the alcohol may have on the fuel system. In general, if only
gasoline containing alcohol is available, it must not contain more than 10% ethanol
or 5% methanol, and the addition of a Water Separating Fuel Filter is
recommended.
If gasoline containing alcohol is used or if you suspect the presence of alcohol in
your gasoline, increase your inspection of the fuel system, visually checking for
fuel leaks or abnormalities.
Gasoline containing alcohol may cause the following problems to your outboard
and fuel system:
• Corrosion of metal parts.
• Deterioration of elastomers and plastic parts.
• Wear and damage of internal engine parts.
• Starting and operating difficulties.
• Vapor lock or fuel starvation.
Some of these adverse effects are due to the tendency of gasoline containing
alcohol to absorb moisture from the air, resulting in a phase of water and alcohol
which separates from the gasoline in the fuel tank.
The adverse effects of alcohol are more severe with methanol and are worse with
increasing content of alcohol.
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FILLING FUEL TANK
WARNING
Avoid serious injury or death from a gasoline fire or explosion. Always
stop the engine and DO NOT smoke or allow open flames or sparks in the
area while filling fuel tanks.
Fill fuel tanks outdoors away from heat, sparks, and open flames.
Remove portable fuel tanks from boat to refill them.
Always stop engine before refilling tanks.
Do not completely fill the fuel tanks. Leave approximately 10% of the tank volume
unfilled. Fuel will expand in volume as its temperature rises and can leak under
pressure if the tank is completely filled.
Portable Fuel Tank Placement in the Boat
Place the fuel tank in the boat so that the tank vent will stay higher than the fuel
level in the tank under normal boat operating conditions.
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+20
+40
+60
+80
F° C°
0
+100
-7
+4
+16
+27
-18
+38
SAE
10W-30
SAE
25W-40
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ENGINE OIL RECOMMENDATIONS
We recommend the use of Mercury or Quicksilver SAE 10W–30 multi–viscosity
4–stroke outboard oil for general, all–temperature use. If SAE 25W–40
multi–viscosity oil is preferred, (see chart above) use Mercury MerCruiser 4–cycle
engine oil or Quicksilver sterndrive & inboard 4–cycle engine oil. Never use
4–cycle engine oil that is not certified to meet or exceed any one or combination
of the following American Petroleum Institute (API) Service Classification SH, SG,
SF, CF–4, CE, CD, CDII. Severe engine damage may result from use of an inferior
oil.
RECOMMENDED SAE VISCOSITY FOR ENGINE OIL
• SAE 10W-30 viscosity oil is recommended for use in all temperatures.
• SAE 25W-40 viscosity oil may be used at temperatures above 40° F (4° C).
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b
a
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CHECKING AND ADDING ENGINE OIL
IMPORTANT: Do not overfill. Be sure that the outboard is upright (not tilted)
when checking oil.
1 Turn the engine off. Have the outboard in a level operating position. Remove
the top cowl.
2 Flip the handle up and pull out the dipstick (a). Wipe it with a clean rag or towel
and push it back in all-the-way.
3 Pull the dipstick back out again and observe the oil level. If the oil level is low,
remove the oil filler cap (b) and fill to (but not over) the upper oil level with the
recommended oil.
IMPORTANT: Inspect oil for signs of contamination. Oil contaminated with
water will have a milky color to it; oil contaminated with fuel will smell
strongly of fuel. If contaminated oil is noticed, have the engine checked by
your dealer.
4 Push the dipstick back in all the way, then flip the handle down to lock the
dipstick in place. Reinstall the oil filler cap and hand tighten securely.

Mercury 30 Specifications

General

Brand	Mercury
Model	30
Category	Outboard Motor
Language	English