Safety Interlock - Craftsman 79960 Owner's Manual

TROUBLESHOOTING POINTS
Before performing any of the corrections in this Troubleshooting Chart, refer to the appropriate information
contained in this Manual for the correct safety precautions and operating or maintenance procedures.
PROBLEM !
Engine Does Not Start
EngineRunsPoorly
Engine Overheats
Chipper Does Not Chip
ChippingPerformance Is
Poor
POSSIBLE CAUSE
1 Spark plug wire disconnected
2, Engine Control Lever in OFFposition
3 Fueltank empty
4 Stale gasoline
5 Safety Interlock switch has failed
6 Collection bag or blower deflector not installed
7 Incorrect Control Lever setting
8, Dirty air filter
9, Defective or incorrectly gapped spark plug
t0 Carburetor out of adjustment
t Badspark plug
2 IncorrectEngineControlLeversetting
3 Dirtyair filter
4 Carburetor o ut of adjustment
5 Stalegasoline
6, Dirt or waterin fuel tank
7 Engine coolingsystemclogged
1 Enginecooling system clogged
2 Carburetor out of adjustment
3 Oil level is tow
t Solidobjectjammed in unit
2 Brokenor missingchipperblade
I LDull chipper blade
2, Engine not reaching full RPM
3 Excessivelyworn engine shaft bearing(s)
4 Loose engine mounting bolts
5, Chipper blade to anvil clearance incorrect
CORRECTION
1 Reconnectwire
2 Put Engine Control Lever in START(Page 20)
3 Add gasoline (Page 19)
4 Drain gasoline and add fresh gasoline
5 Contact Sears Service Center
6 Install collection bag or blower deflector
7 Put Controt Lever in START(Page20)
8 Replacefilter (Page 28)
9 Inspect spark plug (Page28)
10 Contact Sears Service Center
! Replacespark ptug (Page29)
2 Put Lever in correct setting (Page 20)
3, Replacefilter (Page 28)
4 Contact Sears Service Center
5 Drain gasoiine and add fresh gasoline
6 Contact Sears Service Center
7 Clean air intake screen and cooling fins
(Page 28)
1
2
3
Clean air intake screen and cooling fins
(Page 28)
Contact Sears Service Center
Checkandaddoil(Page 27)
1 Check for and remove anyobstruction
(Page26)
2. Replace blade(Page30)
1 Sharpen or replaceblade(Page30)
2 ContactSearsServiceCenter
3, Contact S earsServiceCenter
4 Tightenbolts(Page29)
5: Contact S earsServiceCenter (correct
clearance is 030"-090")
33