The STIHL Compression Tester is a professional‑grade diagnostic tool used to measure cylinder pressure on STIHL handheld power equipment. This tester connects directly into the spark‑plug port and provides accurate compression readings—essential for diagnosing hard‑starting engines, low power, poor idle, or suspected piston/cylinder wear.

Key Features

• Genuine STIHL Special Tool for accurate compression diagnosis
• Measures engine compression via spark‑plug hole
• Heavy‑duty construction with metal connectors and reinforced hose
• Clear, easy‑read analogue gauge
• Helps diagnose:
  • Worn piston rings
  • Scored cylinders
  • Leaking crank seals
  • Gasket failures
  • Valve/reed issues (4‑MIX engines)
• Essential for maintenance, troubleshooting and post‑repair verification
• Suitable for workshop and field use

Compatible STIHL Models

According to verified fitment data, this tool is compatible with a wide range of STIHL equipment, including:

Brushcutters / Clearing Saws
FS 87, FS 89, FS 90, FS 91, FS 111, FS 130, FS 131, FS 310, FR 130 T, FR 131 T

KombiSystem Engines
KM 90 / KM 90 R, KM 91 R, KM 100 / KM 100 R, KM 110 R, KM 111 R, KM 130 / KM 130 R, KM 131 / KM 131 R

Hedge Trimmers / Pole Pruners
HL 90, HL 95, HL 91, HL 92, HL 94, HL 100, HT 101, HT 103, HT 130, HT 131, HT 132, HT 133

Blowers
BR 500, BR 550, BR 600, BR 700

Earth Augers / Others
BT 130, BT 131, SP 90, FT 100, FC 90/95/96/110/111

…and many more STIHL 2‑stroke and 4‑MIX models.

Ideal For

• Professional mechanics & workshop technicians
• Tree surgeons & landscapers maintaining fleet equipment
• Diagnosing hard‑starting or low‑power machines
• Checking engine health before major repairs
• Verifying condition after piston/cylinder replacements

What’s Included

• STIHL Compression Tester Unit
• Flexible hose with threaded adaptor
• Analogue pressure gauge