Description
Overview:
This Oil Seal 12x22x7 is a Genuine Stihl OEM component designed to stop oil leaks and keep contaminants out of engine and drive assemblies. Built from durable, oil‐resistant elastomer with metal reinforcement and a spring‐loaded sealing lip, it maintains pressure and lubrication under vibration and heat. Sized 12x22x7 mm (0.47x0.87x0.28 in), it is a direct replacement used across a wide range of Stihl handheld machines, including the BG86 and BG86C blowers. It helps protect bearings and crankshaft or gearbox interfaces, supporting smooth running and long service life. Identified by Stihl part number 9639 003 1230, it's suitable for routine maintenance or repairs whenever a 12 mm shaft by 22 mm bore oil seal is specified.
Key Features:
- Genuine Stihl part for assured fit and performance
- Dimensions 12x22x7 mm (0.47x0.87x0.28 in) to match factory specification
- Oil‐ and heat‐resistant elastomer with metal reinforcement for durability
- Spring‐loaded lip provides consistent radial pressure and reliable sealing
- Helps maintain crankcase pressure and lubrication to support efficient running
- Reduces risk of oil weep, air leaks, and premature bearing wear
- Compact design for straightforward installation with basic hand tools
- Suitable across multiple Stihl blowers, brushcutters, hedge trimmers, Kombi engines, and sprayers
Typical Applications:
Used as a replacement radial oil seal on 2‐stroke Stihl engines and gear housings during overhauls or repairs. Common at crankshaft ends (flywheel or clutch side) or drive shafts in tools such as blowers, brushcutters, hedge trimmers, Kombi units, and sprayers where leakage, poor idling, or contamination is observed.
Also known as:
Shaft seal, rotary seal, radial lip seal, crankshaft seal, oil ring, seal ring, rubber oil seal, gasket (informal), oil shaft seal.
Fits Models:
BG45, BG46, BG50, BG55, BG56, BG65, BG66, BG66C, BG85, BG86, BG86C, BR45C, BR200, BT 45, FC 55 DZ, FC 56, FC 70, FC 70 C, FC 73, FC 83, FS36, FS38, FS40, FS44, FS45, FS45C, FS45L, FS46, FS46C, FS50, FS55, FS55C, FS55R, FS55RC, FS55T, FS56, FS56C, FS56R, FS56RC, FS70C, FS70R, FS70RC, FS83, FS83T, HL45, HL56K, HL73, HL73K, HS45, HS52, HT56 C, HT73, KM55, KM55C, KM55R, KM55RC, KM56C, KM56RC, MM 55, MM 55 C, MM 55-Z, MM 56, MM 55 C MultiSystem, MM 55-Z MultiSystem, MM 56 MultiSystem, SH55, SH56, SH56C, SH85, SH86, SH86C, SR 200, SR 200-D, SR 200-Z
Alternate Part Numbers:
9639-003-1230, 96390031230
Product Specifications
| L&S Part No. | 9639 003 1230 |
|---|---|
| Part Type | Genuine Part |
| Manufacturer | Stihl |
| OEM No. | 96390031230 |
| Unit of Sale | 1 |
| Applications | BG45, BG46, BG50, BG55, BG56, BG65, BG66, BG66C, BG85, BG86, BG86C, BR200, BR45C, BT 45, BT45, FC 55 DZ, FC 56, FC 70, FC 70 C, FC 73, FC 83, FC55DZ, FC56, FC70, FC70C, FC73, FC83, FS36, FS38, FS40, FS44, FS45, FS45C, FS45L, FS46, FS46C, FS50, FS55, FS55C, FS55R, FS55RC, FS55T, FS56, FS56C, FS56R, FS56RC, FS70C, FS70R, FS70RC, FS83, FS83T, HL45, HL56K, HL73, HL73K, HS45, HS52, HT56 C, HT56C, HT73, KM55, KM55C, KM55R, KM55RC, KM56C, KM56RC, MM 55, MM 55 C, MM 55 C MultiSystem, MM 55-Z, MM 55-Z MultiSystem, MM 56, MM 56 MultiSystem, MM55, MM55-Z, MM55C, MM55Z, MM56, SH55, SH56, SH56C, SH85, SH86, SH86C, SR 200, SR 200-D, SR 200-Z, SR200, SR200-D, SR200-Z, SR200D, SR200Z |
| Machine Type | Blower/Shredders, Brushcutters |
| Fits Brands | Stihl |
| Fits Models | FS36, FS40, FS44 | FS38, FS45, FS46 | FS40, FS50 | FS55, FS55C, FS55R | FS56, FS56C, FS56R | FS83, FS83T | BG56 | HS45 | BG66 | BG86 | BR45C | BR200 | SH55, SH85 | SH56, SH86 | BG50 | FS70C, FS70R, FS70RC | HT56 C | HT73 | KM55, KM55C, KM55R, KM55RC | KM56C, KM56RC | MM 55, MM 55 C MultiSystem | MM 56 MultiSystem | MM 55-Z MultiSystem | FC 55 DZ | FC 56 | FC 70, FC 70 C | FC 73 | FC 83 | SR 200 | SR 200-D | SR 200-Z | BT 45 | HL45 | HL56K | HL73, HL73K | HS52 | BG55 | BG85 |
