Briggs & Stratton 270962, 271172 Engine Maintenance, Fuel and Oil Recommendations, High Altitude

ENGINE MAINTENANCE

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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

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