Crankshaft Seal Replacement 9639 003 1230 for Stihl BG45 BG46 BG55 BG56 BG85 BG86 Leak‑Proof Durable Fit

Crankshaft Seal Upgrade compatible with Stihl BG45 BG46 BG55 BG56 BG85 BG86, part number 9639 003 1230 Product highlights Restores proper sealing at the crankshaft to help prevent oil and fuel leakage and maintain engine compression. Precision fit to the OEM part number 9639 003 1230 for direct replacement on compatible handheld blower models. Designed for durability and reliable performance during normal use and maintenance cycles. Simple dropin replacement that works with existing crankshaft housing and mounting points. Key benefits Prevents leaks and reduces contamination of the engine crankcase by sealing the crankshaft junction. Restores engine performance affected by worn or damaged seals without needing extensive repairs. Precision dimensions ensure easy installation and correct alignment for smooth crankshaft rotation. Important attributes Function: Crankshaft seal for preventing oil and fuel escape and maintaining compression at the crankshaft interface. Compatibility: Compatible with models BG45, BG46, BG55, BG56, BG85, BG86 and replaces part number 9639 003 1230. Fit: OEMsized, engineered to fit original housing and mounting points for a direct replacement. Construction: Built using durable sealing compounds and components suitable for small engine service life and exposure to fuel and oil. Performance: Provides reliable sealing under typical operating conditions and supports normal engine function. Practical use scenarios Routine maintenance: the crankshaft seal during scheduled service when inspecting small engine wear components. Leak : Install this seal to stop visible oil or fuel leakage at the crankshaft area and prevent further engine contamination. Post rebuild: Use as the replacement seal when repairing or reassembling blower engines to restore correct sealing and compression. Compatibility note Intended as a replacement for part number 9639 003 1230 and for use with the listed blower models. Verify model and part number before installation. Installation tip Inspect the crankshaft and housing for wear or damage before installing the seal. Clean mating surfaces and follow standard installation procedures for small engine seals to ensure proper seating and longevity.