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14 of 16 Rev. 5/2010 
Models: G5000S & G8000S 
Troubleshooting 
Symptom: Potential Causes  Solution 
Engine won't start  Fuel valve off/out of fuel  Fill tank with fuel and turn fuel valve on 
 
Engine Switch in off position  Turn engine switch to on position 
 
Spark arrestor clogged  Remove spark arrestor, clean and replace.  
 
Choke is open 
Close choke by pulling choke handle out. 
Open choke after starting. 
 
Oil level too low 
Fill oil to top of opening with recommended 
grade of oil. 
 
Oil float stuck in shipment 
Fill oil to top of opening, disconnect the yel-
low wire from the low oil level switch. The 
switch is located on the engine above the 
oil drain plug. It is a small gold colored box 
with a yellow and a black wire.  
Start the unit and run it for one hour mini-
mum - this will get enough movement of hot 
oil to free the float if this is the cause.  
Re-attach the yellow wire and run the unit. 
 
Fuel filter is dirty 
Check for fuel flow to carburetor by remov-
ing drain screw. Clean or replace fuel filter. 
 
Fuel is contaminated 
Drain fuel tank and carburetor. Replace or 
clean filter and carburetor float bowl. Fill 
tank with clean fuel. 
 
Spark plug boot off/loose  Press spark plug boot firmly on spark plug.   
 
Spark plug fouled or failed  Remove spark plug, clean or replace 
 
Carburetor clogged 
Remove float bowl and clean components 
and jets. Replace carburetor if varnish or 
gum has accumulated from improper stor-
age. 
Recoil is hard to pull   Spark arrestor clogged  Remove, clean and replace. 
 
Engine flooded with fuel after storage with fuel 
valve in on position 
Remove spark plug and slowly pull recoil to 
discharge excess fuel. Clean and re-install 
spark plug.  
 
Valve clearance too large 
Rest exhaust valve clearance to .008", call 
customer help line. 
Engine starts, but then shuts off 
after running for short time 
Remove/Clean spark arrestor   Remove, clean and replace. 
 
Oil level too low 
Fill oil to top of opening with recommended 
grade of oil. 
 
Fuel valve off/out of fuel  Fill tank with fuel and turn fuel valve on 
 
Spark plug fouled or failed  Remove spark plug, clean or replace 
Engine runs: rough/vibrating/
oscillating 
Remove/Clean spark arrestor   Remove, clean and replace. 
 
The choke is not open  Push choke lever in. 
 
Over loading generator  Disconnect some appliances 
 
Air filter is dirty  Clean air filter 
 
Fuel filter is dirty 
Check for fuel flow to carburetor by remov-
ing drain screw. Clean or replace fuel filter. 
 
Fuel is contaminated 
Drain fuel tank and carburetor. Replace or 
clean filter and carburetor float bowl. Fill 
tank with clean fuel.