STIHL MS290 MS310 MS390 Chainsaw Troubleshooting Manual

Comprehensive troubleshooting and repair manual for STIHL MS 290, MS 310, and MS 390 chainsaws, covering all three models with unified technical guidance. Includes detailed engine specifications—displacement, bore, piston stroke, power output, and maximum RPM—essential for accurate diagnostics and part identification. The workshop manual walks through engine block assembly and maintenance, including muffler service, seal inspection, housing integrity checks, and gasket replacement procedures. Dedicated sections address the starting system, ignition module operation, spark plug cable routing and contact inspection, and handle assembly with safety considerations. The fuel system chapter covers air filter cleaning and replacement, carburetor tuning and disassembly, fuel line routing, and fuel pump function, with step-by-step reassembly sequences. Chain lubrication receives thorough treatment, detailing intake line inspection, check valve operation, reservoir access and refilling, oil pump dismounting, and reassembly alignment. Technical data presented in both metric and US customary measurements. Numbered illustrations clarify component positioning and assembly order throughout. Includes guidance on special service tools and authorized after-sales accessories. An indispensable service manual for professional technicians, authorized repair centers, and anyone maintaining these popular professional-grade chainsaws.