2.3 FUEL RECOMMENDATIONS
Fuel Recommendations Fuel must meet these requirements:
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Clean, fresh, unleaded petrol.
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A minimum of 87 octane/87 AKI (91 RON). High altitude use, see below.
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petrol with up to 10% ethanol (gasohol) is acceptable.
NOTICE
Do not use unapproved petrols, such as E15 and E85. Do not mix oil in petrol or
modify the engine to run on alternate fuels. Use of unapproved fuels will
damage the engine components, which will not be covered under warranty.-
To protect the fuel system from gum formation, mix a fuel stabilizer into the fuel. See
Storage below. 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 petrol. 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)
petrol is acceptable.
For carbureted engines, high altitude adjustment is required to maintain performance.
Operation without this adjustment will cause decreased performance, increased fuel
consumption, and increased emissions. Contact a Briggs & Stratton Authorized Service
Dealer for high altitude adjustment information. Operation of the engine at altitudes
below 2,500 feet (762 meters) with the high altitude adjustment is not recommended.
Storage
WARNING
Fuel and its vapors are extremely flammable and explosive. Fire or explosion can
cause severe burns or death.
When Storing Fuel Or Equipment With Fuel In Tank
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Store away from furnaces, stoves, water heaters or other appliances that have pilot
lights or other ignition sources because they can ignite fuel vapors.
Fuel System
Fuel can become stale when stored over 30 days. Stale fuel causes acid and gum
deposits to form in the fuel system or on essential carburetor parts. To keep fuel fresh,
use Briggs & Stratton Advanced Formula Fuel Treatment & Stabilizer, available wherever
Briggs & Stratton genuine service parts are sold.
There is no need to drain petrol from the engine if a fuel stabilizer is added according to
instructions. Run the engine for two (2) minutes to circulate the stabilizer throughout the
fuel system before storage.
Chapter 2: Safety instructions
Redwood Global Ltd - ST6P
Operator and Maintenance Manual
39 12-00-001 v4.0
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