Heavy DutyPowerEquipment 4550 Pro, 5650, 6500(EL), 7550 Pro
Troubleshooting
Symptom:
Potential Causes
Fuel valve off/out of fuel
Spark arrestor clogged
Choke is open
Vacuum check valve has failed
On/Off switch broken
Oil level too low
Oil switch
Recoil is broken
Fuel filter is dirty
Fuel is contaminated
Spark plug boot off/loose
Ignition coil failure
Spark plug fouled or failed
Carburator clogged
No spark_ engine not catching, engine won't start
Check / solution
Fill tank/turn fuel valve on
Remove, clean and replace.
Close choke by pulling choke wire out. Open choke after starting
Replace check valve
Use fuel shut-off as ON/OFF switch until switch is replaced.
The engine shuts down when oil level low
Verify oil switch/sensor is functioning. The oil switch is the gold, brass colored box about 3 inches to the
left of the oil fill cap. Dis-connect oil switch by disconnecting black lead out of finger connection. If the
engine starts, then switch/sensor is faulty or the oil level is too low, if engine still does not start, then
switch/sensor is probably ok to reassemble
If ratchets are broken they will not spin the engine.
Contaminates will clog filter, not allowing fuel to get to engine. Clean or replace fuel filter.
Contaminates in fuel will not allow combustion at the specified pressure and temperate and blocks filters
Press spark plug boot firmly on spark plug.
Remove spark plug, clean or replace
Clean with fresh fuel
Recommendation
Call DEK for parts/service
Call DEK for parts/service
Call DEK for parts/service
Call DEK for parts/service
Call DEK for parts/service
Call DEK for parts/service
Call DEK for parts/service
Call DEK for parts/service
Symptom: Recoil is hard to pull or not retracting
Potential Causes Check / solution
Spark arrestor Remove, clean and replace.
Recoil rubbing on dented housing
Alternator bearing failed Alternator bearing needs to be replaced. Send to service.
Camshaft detent has failed
Head valve timing is off
Recommendation
Call DEK for parts/service
Call DEK for parts/service
Call DEK for parts/service
Call DEK for parts/service
Symptom:
Potential Causes
Remove/Clean spark arrestor
Oil level too low
Fuel valve off/out of fuel
Spark plug fouled or failed
Vacuum check valve has failed
Engine starts, but then shuts off before 10 seconds
Check / solution
Remove, clean and replace.
The engine shuts down when the oil level is low. Check the owners manual for oil capacity
Fill tank/turn fuel valve on
Remove spark plug, clean or replace
Replace check valve, call DEK for replacement procedure.
Recommendation
Call DEK for parts/service
Call DEK for parts/service
Symptom:
uses
Choke broke
Choke wire broke
_r -I- _Recommendation ]
closed while starting. Pull black choke counter-clockwise and hold in place with wire. | Call DEK for parts/service I
ting. / I
Symptom:
Potential Causes
Remove/Clean spark arrestor
The choke is not open
Over loading generator
Air filter is dirty
Fuel filter is clogged
Fuel is contaminated
Vacuum check valve has failed
Head valve timing is off
Engine runs: rough/vibrating/oscillating
Check / solution
Remove, clean and replace.
Push choke lever in.
Disconnect some appliances
Clean air filter
Contaminates will clog filter, not allowing fuel to get to engine. Clean filter
Contaminates in fuel will not allow combustion at the specified pressure and temperate
Replace check valve.
Send to service
Recommendation
Call DEK for parts/service
Call DEK for parts/service
Symptom:
Potential Causes
Remove/Clean spark arrestor
Choke is open
Over loading generator
Air filter is dirty
Fuel filter is clogged
Engine runs, but boggs down under load
Check / solution
Remove, clean and replace.
Push choke lever in
Disconnect some appliances / devices
Clean air filter
Contaminates will clog filter, not allowing fuel to get to engine
Recommendation
Symptom:
Potential Causes
Bad extension cord/power strip
Push button breaker tripped
GFCI tripped
GFCI failed
Engine runs_ Volt meter shows 120 VAC_ but no power to outlets
Check / solution
Try different / shorter extension cord or a different power strip
Disconnect all loads and push reset button.
Disconnect all loads. Push the red reset button very deep/firmly
Replace GFCI with any GFCl or household outlet
Recommendation
Call DEK for parts/service
Rev. 1/2010
DEK® is registered trademark of GXi Outdoor Power, LLC Clayton, NC 27520 USA.
No part of this publication can be printed or copied without written permission.
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