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Rev: 8/2008
19 of 21
36B, 36BX, 36H, 36HX, 52H, 52HX
DEK
®
is exclusively distributed by GXi International, LLC
Heavy Duty Power Equipment
Troubleshooting
Problem Possible Causes Solution
Engine will not start
Engine will not keep running / quits
Engine stops when blades are engaged
Blades do not turn
Engine stops when belt drive mower is
put into gear
Belts squeal when blades are engaged
Belts slip when blades are engaged
1. Turn key to ON position
2. Add gasoline
3. Prime engine or shake bubble out
4. Turn valve ON
5. Turn choke on
6. Adjust choke linkage (p. 11)
7. Add engine oil
8. Push lever to OFF position
9. Slide lever firmly into “N” or neutral
position
10. Tighten wire or connections
11. Clean or replace the plug
12. Clean or replace the air filter
13. Drain and replace the gasoline
14. Replace the fuel filter
15. Adjust or tighten switches (p. 18) -
read warnings!
16. Recharge or replace the battery
To test if the blade activation safety
switches are a contributing factor to the
engine not starting, try depressing the
“operator present” switch o the handle
bars while trying to start. If engine starts,
a safety switch adjustment is required.
1. Drain and replace the fuel
2. Adjust switch (p. 18)
3. Turn fuel valve ON
4. Replace fuel filter
5. Clean or replace air filter
6. Add engine oil
1. Adjust switch (p. 18)
2. Adjust belt (p. 17 and 18)
3. Remove foreign material
Note: sometimes firmly pushing the
blade control lever into the OFF position
can resolve this problem by ensuring the
safety switch is fully engaged.
1. Replace belt
2. Adjust belt (p. 17 and 18)
3. Adjust linkage (p. 17)
1. Adjust safety switch (p. 18)
2. Call for assistance
3. Depress safety switches
1. Adjust belt tension
2. Replace belt
1. Adjust belt tension
2. Replace belt
1. Key is in the off position
2. Insufficient fuel in the tank
3. Air bubble in the fuel line
4. Fuel valve in OFF position
5. Choke not ON
6. Choke linkage is out of adjustment
7. Low engine oil
8. Blade control is in the ON position
9. Transmission is in gear (belt drive
model).
10. Spark plug wire is lose
11. Spark plug is fouled
12. Air filter is plugged or dirty
13. Bad gasoline
14. Fuel filter is plugged or dirty
15. Safety switches are out of alignment
or loose.
16. Battery is dead (electric start mod-
els)
1. Water in the fuel
2. Loose safety switch
3. Fuel valve is OFF
4. Dirty fuel filter
5. Dirty air filter
6. Low engine oil
1. Loose safety switch
2. Belt tension too high
3. Blades jammed with foreign material
1. Broken belt
2. Loose belt
3. Blade activation linkage out of ad-
justment.
1. Loose safety switch
2. Transmission seized
3. Safety switches not engaged
1. Incorrect belt tension
2. Excessive belt wear
1. Incorrect belt tension
2. Excessive belt wear