Craftsman 580.752840 Operator's Manual page 9

To protect the fuel system from gum formation, mix in a fuel
stabilizer when adding fuel. See Storage. All fuel is not the
same. If you experience starting or performance problems
after using fuel, switch to a different fuel provider or change
brands. This engine is certified to operate on gasoline. The
emission control system for this engine is EM (Engine
Modifications).
1. Cleanarea around fuel fill cap, remove cap.
2. Slowly add regular unleadedfuel (A) to fuel tank (B). Be
careful not to overfill. Allow about 1.5" (4 cm) (C) of tank
space for fuel expansion.
3. install fuel cap and wait for any spilled fuel to evaporate.
CAUTION! Alcohol-blended fuels (called gasohol, ethanol or
methanol) can attract moisture, which leads to separation and
formation of acids during storage. Acidic gas can damagethe
fuel system of an engine while in storage.
To avoid engine problems, the fuel system should be treated
with a fuel preserver or emptied before storage of 30 days or
longer. If adding a fuel preserver,fill the fuel tank with fresh
fuel. If only partially filled, air in the tank will promote fuel
deterioration during storage. If fuel preserver is not used,
drain the fuel tank, start the engine and let it run until the fuel
lines and carburetor are empty. Use fresh fuel next season.
See Storagefor additional information.
NEVERuse engine or carburetor cleaner products in the fuel
tank as permanent damage may occur.
HighAllude
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. Operationwithout this adjustment wiii cause
decreasedperformance, increased fuel consumption, and
increased emissions. See a qualified Sears dealer for high
altitude adjustment information. Operation of the engine at
altitudes below 2,500 feet (762 meters) with the high altitude
kit is not recommended.
FreshStart@ Fuel Cap
The Fresh Start@fuel cap (D) is designedto hold a
cartridge (E) which contains fuel preserver. Adding fuel
preserver helps keepfuel fresh and carburetors clean for
easier starting all season long. The Fresh Start@fuel cap, if
equipped with a cartridge, automatically drips concentrated
fuel preserver into your fuel tank so you don't haveto add it
yourself.
NOTICE Fresh Start@fuel preserver cartridge is availableas
an optional accessory, retail item 7133386. It is not included
with the pressure washer. Contact the original equipment
manufacturer, retailer, or dealer to obtain a cartridge designed
for the Fresh Start@fuel cap installed on this engine.
Readand follow all instructions and warnings given in the
Fresh Start@fuel preserver cartridge package.