Stihl Mechanical Trigger Linkage Failure

Trigger feels loose or does not spring back, and spray is intermittent

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Possible Causes

Broken trigger return spring, worn trigger pivot, cracked trigger lever, misaligned linkage to valve or switch

How to Fix / Troubleshooting

Safety: Unplug the cleaner.

  • Open handle: Remove screws and split the handle housing.
  • Inspect trigger parts: Look for broken plastic around the pivot, missing or stretched springs, and misaligned linkage rods.
  • Replace damaged parts: Install a new trigger lever or spring kit as needed.
  • Lubricate lightly: Apply a small amount of silicone-safe lubricant to the pivot if it was sticking.
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Repair Difficulty

Easy 2/5

Required Part

Trigger Lever Assembly
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