Lubricateo-Rings - Craftsman 580.750840 Operator's Manual

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.
HighAltitude
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.
LubricateO-Rings
Lubrication of o-rings is extremely important for installation
and operation. The use of a lubricant (petroleum or synthetic
grease) during assembly helps seat o-rings properly and
provides an improved seal. It also helps protect the o-ring
from damage by abrasion, pinching or cutting and extends
the life of the o-ring.
NOTICE ALWAYS apply a small amount of lubricant on o-
rings prior to assembling the garden hose to the pump
inlet (D), high pressure hose to pump outlet (E), high
pressure hose (F), spray gun (6), and nozzle extension (H).
Lubricateall connectionsshownbelow, following these
instructions:
1. inspect and clean connecting surfaces prior to
lubrication and assembly.
2. Use lubricants sparingly during assembly; a light film is
all that is required.
3. Use a small brush or cotton swab to apply grease
directly to o-rings where they are not accessible (QC
fitting, M22 fitting).