Stihl 1123 · Section A · 1 of 18 · 25 parts

Engine

Fits MS 230, MS 230 C.

This drawing carries 2 bore sizes — Ø 40 mm (also listed for the 021, 023, MS 210, MS 210 C), Ø 42.5 mm (also listed for the 025, MS 250, MS 250 C). Not interchangeable — measure your cylinder before ordering.

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Parts (25)

Pos	Part number	Description	Qty
1	1123 020 1228	Cylinder with piston Ø 42.5 mm	1
2	1123 020 1223	Cylinder with piston Ø 40 mm	1
3	1123 020 1223	Cylinder with piston Ø 40 mm	1
4	1123 020 1224	Cylinder with piston Ø 40 mm	1
5	1123 020 1226	Cylinder with piston Ø 40 mm	1
6	1123 030 2016	Piston Ø 42.5 mm	1
7	1123 030 2019	Piston Ø 40 mm	1
8	1123 034 3006	Piston ring Ø 42.5x1.2 mm	2
9	1123 034 3005	Piston ring Ø 40x1.2 mm	2
10	4119 034 1500	Piston pin 10x6.5x28	1
11	9463 650 1000	Snap ring 10	2
12	0000 988 5211	Connector	1
13	9512 003 2250	Needle cage 10x13x12.5	1
14	1123 030 0408 NLA	Crankshaft	1
15	9503 003 0340	Grooved ball bearing 6202 → replaced by 9503 003 0346 TI 6/2001	2
16	9638 003 1581	Oil seal 15x25x5	2
16	9639 003 1585	Oil seal 15x25x5	2
17	9468 621 1520	Circlip 15x1	1
18	1123 021 2500	Engine pan	1
19	9075 478 4195	Pan head self-tapping screw IS-D5.3x41	4
20	1123 020 9400	Decompression valve	1
21	1122 025 2200	Plug	1
22	1110 400 7005	Spark plug Bosch WSR 6 F	1
22	0000 400 7000	Spark plug NGK BPMR7A	1
Not numbered on the diagram — assemblies, kits and options
—	0783 830 2000	Tube of sealant Dirko HT red 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 NLA = withdrawn by STIHL before 2012.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 MS 230, MS 230 C? Report a correction →