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Fuel Recommendations
Gasoline
Use clean, fresh, unleaded gasoline. Leaded gasoline may be
1
used if unleaded is not available. A minimum of 85 octane is
recommended. The use of unleaded gasoline results in
fewer combustion deposits and longer valve life.
NOTE:
We do not recommend the use of gasoline
that contains alcohol, such as gasohol. However, if
used, it must not contain more than 10 percent
Ethanol and must be removed from the engine
during storage. Do not use gasoline that contains
Methanol.
Only purchase a 30-day supply of gasoline. Fresh gasoline
minimizes gum deposits and also will ensure fuel volatility
tailored for the season in which the engine will be operated.
NOTE:
The use of a fuel additive, such as Briggs &
Stratton Gasoline Additive (#5041) or equivalent,
will minimize the formation of fuel gum deposits
during storage. Such an additive may be added to the
fuel tank or storage container.
Oil Recommendations
Lubrication System
Oil has four purposes. It cools, it cleans, it seals, and it
lubricates. This engine is lubricated with an oil slinger.
During normal operation, small particles of dust, metal from
the cylinder walls, pistons, bearings, and combustion
deposits will gradually contaminate the oil. If the oil is not
changed regularly, these foreign particles can cause
increased friction and an abrasive action, which shortens the
life of the engine. Fresh oil also assists in cooling. Old oil
gradually becomes thick and loses its cooling ability and
lubricating qualities.
Engine Oil
Use a high quality detergent oil classified "For Service SF,
SG, SH, SJ" or higher. Briggs & Stratton strongly
recommends the use of synthetic oil such as Briggs &
Stratton (#100030C) or equivalent. If not available, SAE 30
weight oil is an acceptable substitute. No special additives
should be used with recommended oils.
Do not mix oil with gasoline.
5 HP Outboard • Troubleshooting & Repair Manual
Synthetic 5W-30W, 10W-30
32
°F
-20
0
20
-30
°C
-20
-10
STARTING TEMPERATURE RANGE ANTICIPATED BEFORE NEXT OIL CHANGE
Air-cooled engines run hotter than automotive engines.
The use of multi-viscosity oils, (10W-30 etc.) in ambient
temperatures above 40°F (4°C), will result in high oil
consumption. If multi-viscosity oil is used, check oil level
more frequently to prevent any possible engine damage
due to lack of lubrication.
SAE 30 oil, if used in ambient temperatures below 40°F
(4°C), will result in hard starting and possible engine
damage due to inadequate lubrication.
Synthetic oil meeting ILSACGF-2, API certification mark
and API service symbol with "SJ/CF ENERGY
CONSERVING" rating or higher, is acceptable oil at all
temperatures.
NOTE:
Use of synthetic oil does not alter the
required oil change intervals.
Oil Drain Plug, Oil Fill and Dipstick
1. Change oil every 25 hours.
2. Position the engine vertically to check or change the
oil.
3. Remove oil drain plug
engine is still warm.
Figure 1 — Oil Drain Plug
1
6
Section 1 • Introduction
SAE 30
80
40
60
100
0
10
20
30
40
Drain oil while
(Figure 1)
1
.
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