Stihl 4203 · Section A · 1 of 12 · 33 parts
Crankcase, Cylinder
Fits SR 340, SR 420.
This drawing carries 2 bore sizes — Ø 41 mm , Ø 46 mm . Not interchangeable — measure your cylinder before ordering. The catalogue lists them on one sheet for one machine and never says which variant each belongs to, so this guide does not either.
Parts (33)
| Pos | Part number | Description | Qty |
|---|---|---|---|
| 1 | 4203 020 2106 | Crankcase | 1 |
| 2 | 9371 470 2610 | Cylindrical pin 5x18 | 2 |
| 3 | 9465 620 2620 | Snap ring 37 | 1 |
| 4 | 9523 003 4260 | Grooved ball bearing 15x35x13 | 1 |
| 5 | 9503 003 0340 | Grooved ball bearing 6202 → replaced by 9503 003 0346 TI 6/2001 | 1 |
| 6 | 4116 030 0400 | Crankshaft | 1 |
| 7 | 1120 036 8500 | Woodruff key 2x3.7 | 1 |
| 8 | 9640 003 1600 | Oil seal 15x29.6x4 | 1 |
| 9 | 9640 003 1340 | Oil seal 13x22x5 | 1 |
| 10 | 4203 029 0500 | Gasket | 1 |
| 11 | 9022 341 1050 | Spline screw IS-M5x25 | 4 |
| 12 | 4203 020 1200 | Cylinder with piston Ø 41 mm | 1 |
| 13 | 4203 030 2000 | Piston Ø 41 mm | 1 |
| 14 | 4203 034 3000 | Piston ring Ø 41x1.5 mm | 2 |
| 15 | 4119 034 1500 | Piston pin 10x6.5x28 | 1 |
| 16 | 9463 650 1000 | Snap ring 10 | 2 |
| 17 | 4203 020 1201 | Cylinder with piston Ø 46 mm | 1 |
| 18 | 4203 030 2001 | Piston Ø 46 mm | 1 |
| 19 | 1118 034 3001 | Piston ring Ø 46x1.5 mm | 2 |
| 20 | 1110 034 1500 | Piston pin 10x6x32 | 1 |
| 21 | 9512 003 2344 | Needle cage 10x14x13 | 1 |
| 22 | 4203 029 2300 | Cylinder gasket | 1 |
| 23 | 1115 149 0600 | Muffler gasket | 1 |
| 25 | 1110 400 7005 | Spark plug Bosch WSR 6 F | 1 |
| 26 | 0000 998 0603 | Torsion spring → replaced by 0000 998 0604 TI 30/1995 | 1 |
| 27 | 1106 405 1000 | Spark plug boot → replaced by 1128 405 1000, 1128 405 1000 TI 30/1995 | 1 |
| 28 | 4203 180 2150 | Support | 1 |
| 29 | not sold separately | Washer 5.3 | 1 |
| 30 | not sold separately | Spline screw IS-M5x20 | 1 |
| 31 | 9291 021 0121 | Washer 5.3 | 1 |
| 32 | 9022 341 0980 | Spline screw IS-M5x16 | 1 |
| 33 | 9022 371 1020 | Spline screw IS-M5x20 → replaced by 9022 371 1050 TI 30/2004 | 3 |
| Not numbered on the diagram — assemblies, kits and options | |||
| — | 4203 007 1050 | Set of gaskets | 1 |
Parts are not interchangeable across engine series — check yours before ordering.
Wrong number or missing part for the SR 340, SR 420? Report a correction →