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ENGINE MAINTENANCE
Fuel and Oil Recommendations
Fuel must meet these requirements:
• Clean, fresh, unleaded gasoline.
• A minimum of 87 octane / 87 AKI
(90 RON).
• Gasoline with up to 10% ethanol
(gasahol) or up to 15% MTBE (methyl
tertiary butyl ether) is acceptable.
• NOTICE: Do not use unapproved
gasoline, such as E85. Do not mix oil in
gasoline or modify the engine to run on
alternate fuels. This will damage the
engine components and void the
engine warranty.
To protect the fuel system from gum formation,
mix a fuel stabilizer into the fuel. All fuel is not the
same. If starting or performance problems occur,
change fuel providers or change brands. This
engine is certified to operate on gasoline. The
emissions control system for this engine is EM
(Engine Modifications).
High Altitude
At altitudes over 5,000 feet (1524 meters), a
minimum 85 octane / 85 AKI (89 RON) gasoline
is acceptable. To remain emissions compliant,
high altitude adjustment is required. Operation
without this adjustment will cause decreased
performance, increased fuel consumption, and
increased emissions.
Operation of the engine at altitudes below 2,500
feet (762 meters) with the high altitude kit is not
recommended.
Fresh Start
® Fuel Cap
Some engines are equipped with a Fresh Start
®
fuel cap. The Fresh Start fuel cap is designed to
hold a cartridge (sold separately) that contains
fuel stabilizer.
Oil must meet these requirements:
• Briggs & Stratton Warranty Certified oils
are recommended for best performance.
• Other high-quality detergent oils are
acceptable if classified for service SF,
SG, SH, SJ or higher.
• Do not use special additives.
Outdoor temperatures determine the proper oil
viscosity for the engine. Use the chart (Figure 1)
to select the best viscosity for the outdoor
temperature range expected.
Figure 1