STIHL BG 56, BG 56 C, BG 66, BG 66 C, BG 86, BG 86 C Service Manual

STIHL BG 56, BG 66, BG 86, SH 56, SH 86 Service Manual

• Covers 2008 STIHL BG 56, BG 66, BG 66 C, BG 86, BG 86 C, SH 56, and SH 86 leaf blower and vacuum units including engine, ignition, and fuel system diagnostics.
• Official STIHL service publication (2008-01 revision) providing the standardized reference for these specific engine and blower housing configurations.
• Contains detailed exploded-view assembly diagrams, precise bolt torque specifications, and electrical troubleshooting flow charts.
• File delivered as an instant download the moment your payment clears.
• Fully searchable indexed PDF formatted for standard Letter and A4 printing.

Engine and Fuel System Documentation

When diagnosing a two-stroke blower or vacuum, having the exact factory specs saves hours on the bench. This service manual provides specialized documentation for removal and installation procedures covering the engine assembly, piston, cylinder, and crankshaft. Technicians get access to the factory-specified leakage test procedures—requiring a 0.5 bar vacuum or pressure setting—to confidently verify seal and gasket integrity. The fuel system section breaks down carburetor service, detailing the metering diaphragm replacement, inlet needle inspection, and tank vent testing.

Technical Specification Preview

Fastener torque is critical on these units. The manual lists specific tightening values for all plastic and metal components, including the 3.5 Nm torque requirement for M5 screws used on the filter housing and carburetor flange. It also catalogs engine power ratings across the series, from the 0.60 kW BG 66 up to the 0.8 kW BG 86, along with the precise 0.5 mm spark plug electrode gap and 0.15–0.30 mm ignition module air gap.

Working on power equipment involves inherent physical risks. Always follow basic workshop safety protocols and verify your tools are properly calibrated before applying these specifications, or rely on a certified technician if you lack the necessary experience. Since this 178-page technical reference is an instant download, you can pull up the exact specification you need on your tablet or shop computer right now.