Instruction Manual
Page 2
....5.1 Leakage Test 89 RA_737_00_01_01 MS 231, MS 231 C, MS 251, MS 251 C q © ANDREAS STIHL AG & Co. Specifications 5 2.1 Engine 5 2.2 Fuel System 5 2.3 Ignition System 5 2.4 Chain Lubrication 5 2.5 Tightening Torques 6 3. Troubleshooting 8 3.1 Clutch 8 3.2 Chain Drive, Chain Brake, Chain Tensioner 9 3.3 Chain Lubrication 11 3.4 Rewind Starter... ErgoStart 60 8.5 Rope Rotor 61 8.6 Starter Rope / Grip 61 8.7 Tensioning the Rewind Spring 62 8.8 Replacing the Rewind Spring 63 9. Chain Lubrication 78 11.1 Pickup Body 78 11.2 Oil Suction Hose 78 11.3...
....5.1 Leakage Test 89 RA_737_00_01_01 MS 231, MS 231 C, MS 251, MS 251 C q © ANDREAS STIHL AG & Co. Specifications 5 2.1 Engine 5 2.2 Fuel System 5 2.3 Ignition System 5 2.4 Chain Lubrication 5 2.5 Tightening Torques 6 3. Troubleshooting 8 3.1 Clutch 8 3.2 Chain Drive, Chain Brake, Chain Tensioner 9 3.3 Chain Lubrication 11 3.4 Rewind Starter... ErgoStart 60 8.5 Rope Rotor 61 8.6 Starter Rope / Grip 61 8.7 Tensioning the Rewind Spring 62 8.8 Replacing the Rewind Spring 63 9. Chain Lubrication 78 11.1 Pickup Body 78 11.2 Oil Suction Hose 78 11.3...
Instruction Manual
Page 10
3.2 Chain Drive, Chain Brake, Chain Tensioner Condition Chain sprocket wears rapidly Cause Chain not properly tensioned Wrong chain pitch Insufficient chain lubrication Remedy Tension chain as specified Fit chain of correct pitch Check chain lubrication Saw chain stops under full...Replace the clutch springs or install new clutch Replace the clutch springs Saw chain does not stop immediately when brake is activated Brake spring stretched or broken Fit new brake spring Brake band stretched or worn Clutch drum worn Fit new brake band Install new clutch drum MS 231, MS 231 C, MS 251, MS 251...
3.2 Chain Drive, Chain Brake, Chain Tensioner Condition Chain sprocket wears rapidly Cause Chain not properly tensioned Wrong chain pitch Insufficient chain lubrication Remedy Tension chain as specified Fit chain of correct pitch Check chain lubrication Saw chain stops under full...Replace the clutch springs or install new clutch Replace the clutch springs Saw chain does not stop immediately when brake is activated Brake spring stretched or broken Fit new brake spring Brake band stretched or worn Clutch drum worn Fit new brake band Install new clutch drum MS 231, MS 231 C, MS 251, MS 251...
Instruction Manual
Page 31
...Remove the chain sprocket cover. 165RA007 TG 533RA058 TG 2310RA048 TG 1 3 : Inspect the cover (1), spur gear set (2), tensioner slide (3) and thrust pad (4) and replace as necessary. - Check the wing nut (1) and replace if necessary 30 MS 231, MS 231 C, MS 251, MS 251 C Lubricate ...thread and gears with the contour of the recess (arrows). : Insert and tighten down until it lines up with STIHL multipurpose ...
...Remove the chain sprocket cover. 165RA007 TG 533RA058 TG 2310RA048 TG 1 3 : Inspect the cover (1), spur gear set (2), tensioner slide (3) and thrust pad (4) and replace as necessary. - Check the wing nut (1) and replace if necessary 30 MS 231, MS 231 C, MS 251, MS 251 C Lubricate ...thread and gears with the contour of the recess (arrows). : Insert and tighten down until it lines up with STIHL multipurpose ...
Instruction Manual
Page 96
Check chain tension and adjust if necessary. - push the screwdriver through the pre-installed ... speed with H = 1 1/2 turns open it 1 1/2 turns counterclockwise - Inspect the spark arresting screen (if fitted) and clean or replace if necessary, b 3.7 or b 6.1 - this is the basic setting. - Adjust engine speed with the high speed screw H (1) ...the procedure and start again with the low speed screw L (2) against its seat, open it engages. MS 231, MS 231 C, MS 251, MS 251 C 95 Adjust specified engine speeds within a tolerance of engine damage. 2310RA284 TG 1. Turn the low speed...
Check chain tension and adjust if necessary. - push the screwdriver through the pre-installed ... speed with H = 1 1/2 turns open it 1 1/2 turns counterclockwise - Inspect the spark arresting screen (if fitted) and clean or replace if necessary, b 3.7 or b 6.1 - this is the basic setting. - Adjust engine speed with the high speed screw H (1) ...the procedure and start again with the low speed screw L (2) against its seat, open it engages. MS 231, MS 231 C, MS 251, MS 251 C 95 Adjust specified engine speeds within a tolerance of engine damage. 2310RA284 TG 1. Turn the low speed...
Instruction Manual
Page 97
...is usually necessary to change the setting of the idle speed screw (LA) after every correction to the low speed screw (L). Check chain tension and adjust if necessary. - Warm up the engine. - It is flush with the carburetor body. 12.7.2 Standard setting The ..., MS 231 C, MS 251, MS 251 C Inspect the spark arresting screen (if fitted) and clean or replace if necessary, b 3.7 or b 6.1 2310RA285 TG - Turn the low speed screw (L) slowly clockwise as far as stop . Turn the idle speed screw (LA) counterclockwise until the chain stops running , then turn it back 1 full turn ...
...is usually necessary to change the setting of the idle speed screw (LA) after every correction to the low speed screw (L). Check chain tension and adjust if necessary. - Warm up the engine. - It is flush with the carburetor body. 12.7.2 Standard setting The ..., MS 231 C, MS 251, MS 251 C Inspect the spark arresting screen (if fitted) and clean or replace if necessary, b 3.7 or b 6.1 2310RA285 TG - Turn the low speed screw (L) slowly clockwise as far as stop . Turn the idle speed screw (LA) counterclockwise until the chain stops running , then turn it back 1 full turn ...