Kohler Command Pro CV980 - Manual (Page 30)

5.2
Section 5
Fuel System and Governor
Fuel System Tests
When the engine starts hard, or turns over but will not start, it is possible that the problem is in the fuel system.
˜ȱꗍȱ˜žȱ’ȱ‘ŽȱžŽ•ȱœ¢œŽ–ȱ’œȱŒŠžœ’—ȱ‘Žȱ™›˜‹•Ž–ǰȱ™Ž›˜›–ȱ‘Žȱ˜••˜ ’—ȱŽœǯ
Troubleshooting – Fuel System Related Causes
Test Conclusion
1. Check the following:
a. Make sure the fuel tank contains clean, fresh,
proper fuel.
b. Make sure the vent in fuel tank cap is open.
c. Make sure the fuel valve is open.
d. Make sure the fuel lines to fuel pump are
secured and in good condition.
ȱ Řǯȱ ‘ŽŒ”ȱ˜›ȱžŽ•ȱ’—ȱ‘ŽȱŒ˜–‹žœ’˜—ȱŒ‘Š–‹Ž›ǯ
a. Disconnect and ground spark plug leads.
b. Close the choke on the carburetor.
c. Crank the engine several times.
d. Remove the spark plug and check for fuel at
the tip.
ȱ Řǯȱ ȱ‘Ž›Žȱis fuel at the tip of the spark plug, fuel is
reaching the combustion chamber.
If there is no fuel at the tip of the spark plug,
Œ‘ŽŒ”ȱ˜›ȱžŽ•ȱ̘ ȱ›˜–ȱ‘ŽȱžŽ•ȱŠ—”ȱǻŽœȱřǼǯ
ȱ řǯȱ ‘ŽŒ”ȱ˜›ȱžŽ•ȱ̘ ȱ›˜–ȱ‘ŽȱŠ—”ȱ˜ȱ‘ŽȱžŽ•ȱ™ž–™ǯ
ȱ
Šǯȱ Ž–˜ŸŽȱ‘ŽȱžŽ•ȱ•’—Žȱ›˜–ȱ‘Žȱ’—•ŽȱęĴ’—ȱ˜ȱ
the fuel pump.
ȱ ‹ǯȱ ˜•ȱ‘Žȱ•’—Žȱ‹Ž•˜ ȱ‘Žȱ‹˜Ĵ˜–ȱ˜ȱ‘ŽȱŠ—”ǯȱ
™Ž—ȱ‘Žȱœ‘žȬ˜ěȱŸŠ•ŸŽȱǻ’ȱœ˜ȱŽšž’™™ŽǼȱŠ—ȱ
˜‹œŽ›ŸŽȱ̘ ǯ
3. If fuel doesȱ̘ ȱ›˜–ȱ‘Žȱ•’—ŽǰȱŒ‘ŽŒ”ȱ˜›ȱŠž•¢ȱ
fuel pump (Test 4).
If fuel does notȱ̘ ȱ›˜–ȱ‘Žȱ•’—ŽǰȱŒ‘ŽŒ”ȱ‘ŽȱžŽ•ȱ
Š—”ȱŒŠ™ȱŸŽ—ǰȱžŽ•ȱ™’Œ”ž™ȱœŒ›ŽŽ—ǰȱ’—Ȭ•’—ŽȱꕝŽ›ǰȱ
œ‘žȬ˜ěȱŸŠ•ŸŽǰȱŠ—ȱžŽ•ȱ•’—Žǯȱ˜››ŽŒȱŠ—¢ȱ˜‹œŽ›ŸŽȱ
problem and reconnect the line.
4. Check the operation of the fuel pump.
ȱ Šǯȱ Ž–˜ŸŽȱ‘ŽȱžŽ•ȱ•’—Žȱ›˜–ȱ‘Žȱ’—•ŽȱęĴ’—ȱ˜ȱ
the carburetor.
b. Crank the engine several times and observe
̘ ǯ
4. If fuel doesȱ̘ ȱ›˜–ȱ‘Žȱ•’—ŽǰȱŒ‘ŽŒ”ȱ˜›ȱŠž•¢ȱ
carburetor. (Refer to the "Carburetor" portions of
this section.)
If fuel does notȱ̘ ȱ›˜–ȱ‘Žȱ•’—ŽǰȱŒ‘ŽŒ”ȱ˜›ȱŠȱ
clogged fuel line. If the fuel line is unobstructed,
Œ‘ŽŒ”ȱ˜›ȱ˜ŸŽ›ę••ŽȱŒ›Š—”ŒŠœŽȱŠ—Ȧ˜›ȱ˜’•ȱ’—ȱ™ž•œŽȱ
line. If none of the checks reveal the cause of the
problem, replace the pump.