Stihl 4126 · Section A · 1 of 12 · 32 parts

Crankcase, Cylinder

Fits FS 81, FS 86.

This drawing carries 2 bore sizes — Ø 32 mm (this machine only), Ø 34 mm (also listed for the FS 88). Not interchangeable — measure your cylinder before ordering.

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Parts (32)

Pos	Part number	Description	Qty
1	4126 020 2601	Crankcase, fan side	1
2	9380 620 2570	Roll pin 5x12	4
3	9503 003 0242	Grooved ball bearing 6201	1
4	9640 003 1195	Oil seal 12x22x5	1
5	4126 020 2801	Crankcase, starter side	1
6	4126 030 0400	Crankshaft	1
8	0000 958 1222	Shim 0.1 mm
9	0000 958 1223	Shim 0.2 mm
11	9022 341 1050	Spline screw IS-M5x25	4
12	4126 084 2200	Guard option	1
13	9512 003 1840	Needle cage 8x11x12	1
14	4126 029 2300	Cylinder gasket	1
15	4124 022 0500	Cylinder Ø 32 mm	1
16	4124 034 0500	Piston Ø 32 mm	1
17	4112 034 3000	Piston ring Ø 32x1.5 mm	2
18	4112 034 1500	Piston pin	1
19	9463 650 0805	Snap ring 8x0.7	2
20	4126 022 0501	Cylinder Ø 34 mm	1
21	4126 034 0500 NLA	Piston Ø 34 mm	1
22	4126 034 3000	Piston ring Ø 34x1.5 mm	2
23	4112 034 1500	Piston pin	1
24	9463 650 0805	Snap ring 8x0.7	2
25	9022 341 0980	Spline screw IS-M5x16	4
26	4126 352 8100	Insert	4
27	0000 400 7000	Spark plug NGK BPMR7A	1
28	0000 998 0606	Torsion spring	1
29	1106 405 1000	Spark plug boot → replaced by 1128 405 1000, 1128 405 1000 TI 30/1995	1
Not numbered on the diagram — assemblies, kits and options
—	4124 020 1200	Cylinder with piston Ø 32 mm	1
—	4124 030 2000	Piston Ø 32 mm	1
—	4126 020 1200	Cylinder with piston Ø 34 mm	1
—	4126 030 2000	Piston Ø 34 mm	1
—	1110 400 7005	Spark plug Bosch WSR 6 F not illustrated	1

2012 service parts catalogue. Parts are not interchangeable across engine series — check yours before ordering. NLA = withdrawn by STIHL before 2012.

Wrong number or missing part for the FS 81, FS 86? Report a correction →