If you are diving into a repair right now, here are the quick specs for the 084: Spark Plug Gap: 0.5 mm (0.020 in) Ignition Timing: 2.0 to 2.5 mm (0.08 to 0.10 in) before TDC Clutch Nut: Left-hand thread (Turn clockwise to loosen!) 50:1 (High-quality 2-cycle oil) When searching, always look for the IPL (Illustrated Parts List)
: Procedures for tuning the adjustable oil pump and cleaning the fuel system. stihl 084 av service manual
The 084 AV uses a side-access tensioner. If you force it when dry, you break the nylon gear. The manual shows how to lubricate and index it. If you are diving into a repair right