2 Stroke Engine – Will Not Start

Posted by doc on October 29, 2009 · Leave a Comment 

If you have 2 stroke engine that will not start, you may have one or more of the following problems:

Fuel System

  • Improper starting technique (see previous post)
  • Stale fuel
  • Dirty air filter
  • Dirty fuel filter
  • Inoperable choke/primer
  • Water contamination
  • Flooded with fuel
  • Broken/cracked fuel hoses
  • Carburetor requires repair/service

Ignition System

  • Weak spark
  • Fouled spark plug
  • Faulty stop switch
  • Faulty wiring
  • Misadjusted armature/coil air gap
  • Defective coil/armature

Exhaust System

  • Stopped up exhaust screen
  • Stopped up exhaust port

Compression

  • Low top end compression
  • Low bottom end compression

Timing

  • Improperly adjusted armature/coil air gap
  • Damaged flywheel/flywheel key (rare, but possible)

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