Kohler Command Pro CV980 - Manual (Page 29)

5.1
5
Section 5
Fuel System and Governor
Description
This section covers the carbureted fuel system used on
these engines. The governor system is covered at the
end of this section.
WARNING: Explosive Fuel!
Šœ˜•’—Žȱ’œȱŽ¡›Ž–Ž•¢ȱ̊––Š‹•ŽȱŠ—ȱ’œȱŸŠ™˜›œȱŒŠ—ȱŽ¡™•˜Žȱ
’ȱ’—’Žǯȱ˜›ŽȱŠœ˜•’—Žȱ˜—•¢ȱ’—ȱŠ™™›˜ŸŽȱŒ˜—Š’—Ž›œǰȱ’—ȱ
Ž••ȱŸŽ—’•ŠŽǰȱž—˜ŒŒž™’Žȱ‹ž’•’—œǰȱŠ Š¢ȱ›˜–ȱœ™Š›”œȱ˜›ȱ
̊–Žœǯȱ˜ȱ—˜ȱꕕȱ‘ŽȱžŽ•ȱŠ—”ȱ ‘’•Žȱ‘ŽȱŽ—’—Žȱ’œȱ‘˜ȱ˜›ȱ
›ž——’—ǰȱœ’—ŒŽȱœ™’••ŽȱžŽ•ȱŒ˜ž•ȱ’—’Žȱ’ȱ’ȱŒ˜–Žœȱ’—ȱŒ˜—ŠŒȱ
’‘ȱ‘˜ȱ™Š›œȱ˜›ȱœ™Š›”œȱ›˜–ȱ’—’’˜—ǯȱ˜ȱ—˜ȱœŠ›ȱ‘Žȱ
Ž—’—Žȱ—ŽŠ›ȱœ™’••ŽȱžŽ•ǯȱŽŸŽ›ȱžœŽȱŠœ˜•’—ŽȱŠœȱŠȱŒ•ŽŠ—’—ȱ
ŠŽ—ǯ
Fuel System Components
The typical carbureted fuel system and related
components include the following:
• Fuel Tank and Valve
• Fuel Lines
• In-line Fuel Filter
• Fuel Pump
• Carburetor
Operation
The fuel from the tank is moved through the in-line
ꕝŽ›ȱŠ—ȱžŽ•ȱ•’—Žœȱ‹¢ȱ‘ŽȱžŽ•ȱ™ž–™ǯȱ—ȱŽ—’—Žœȱ—˜ȱ
equipped with a fuel pump, the fuel tank outlet is
located above the carburetor inlet allowing gravity to
feed fuel to the carburetor.
žŽ•ȱ‘Ž—ȱŽ—Ž›œȱ‘ŽȱŒŠ›‹ž›Ž˜›ȱ̘Šȱ‹˜ •ȱŠ—ȱ’œȱ
drawn into the carburetor body. There, the fuel is
mixed with air. This fuel-air mixture is then burned in
the engine combustion chamber.
Fuel Recommendations
General Recommendations
Purchase gasoline in small quantities that can be used
within 30 days and store only in clean, approved
Œ˜—Š’—Ž›œǯȱ˜ȱ—˜ȱžœŽȱŠœ˜•’—Žȱ•ŽĞȱ˜ŸŽ›ȱ›˜–ȱ‘Žȱ
previous season, unless treated with a fuel stabilizer
(see Storage in Section 1), to minimize gum deposits
and ensure easy starting. Do not use gasoline
containing Methanol, or add oil to the gasoline.
˜ȱ—˜ȱ˜ŸŽ›ę••ȱ‘ŽȱžŽ•ȱŠ—”ǯȱŽŠŸŽȱ›˜˜–ȱ˜›ȱ‘ŽȱžŽ•ȱ
to expand.
Fuel Type
For best results, use only clean, fresh, unleaded
gasoline with a pump sticker octane rating of 87 or
higher. In countries using the Research fuel rating
method, it should be 90 octane minimum.
Unleaded gasoline is recommended as it leaves
less combustion chamber deposits and reduces
harmful exhaust emissions. Leaded gasoline is not
recommended.
Gasoline/Alcohol blends
Gasohol (up to 10% ethyl alcohol, 90% unleaded
gasoline by volume) is approved as a fuel for Kohler
Ž—’—Žœǯȱ‘Ž›ȱŠœ˜•’—ŽȦŠ•Œ˜‘˜•ȱ‹•Ž—œȱ’—Œ•ž’—ȱŘŖȱ
Š—ȱŞśȱŠ›Žȱ—˜ȱ˜ȱ‹ŽȱžœŽȱŠ—ȱ—˜ȱŠ™™›˜ŸŽǯȱ—¢ȱ
failures resulting from use of these fuels will not be
warranted.
Gasoline/Ether blends
Ž‘¢•ȱŽ›’Š›¢ȱž¢•ȱ‘Ž›ȱǻǼȱŠ—ȱž—•ŽŠŽȱ
Šœ˜•’—Žȱ‹•Ž—œȱǻž™ȱ˜ȱŠȱ–Š¡’–ž–ȱ˜ȱŗśƖȱȱ‹¢ȱ
volume) are approved as a fuel for Kohler engines.
‘Ž›ȱŠœ˜•’—ŽȦŽ‘Ž›ȱ‹•Ž—œȱŠ›Žȱ—˜ȱŠ™™›˜ŸŽǯ
Fuel Filter
Most engines are equipped with an in-line fuel
ꕝŽ›ǯȱŽ›’˜’ŒŠ••¢ȱ’—œ™ŽŒȱ‘ŽȱꕝŽ›ȱŠ—ȱ›Ž™•ŠŒŽȱ ’‘ȱ
ŠȱŽ—ž’—Žȱ
˜‘•Ž›ȱꕝŽ›ȱseasonally or every 150
operating hours.
Fuel Line
‘ŽœŽȱŽ—’—ŽœȱžœŽȱ˜ ȱŽ›–ŽŠ’˜—ȱȱřŖȱŝȱ›ŠŽȱ
žŽ•ȱ•’—ŽDzȱŒŽ›’ꮍȱ˜ȱ–ŽŽȱŽ–’œœ’˜—ȱ›Žšž’›Ž–Ž—œǯȱ
Š—Š›ȱžŽ•ȱ•’—Žȱ–Š¢ȱ—˜ȱ‹ŽȱžœŽǯȱ›Ž›ȱ
replacement hose by part number through a Kohler
—’—ŽȱŽ›Ÿ’ŒŽȱŽŠ•Ž›ǯ