Instruction Manual
Page 5
... press fluids are heated for assembly or disassembly. replace as the safety precautions and warnings in damage to overheating. 4 MS 231, MS 231 C, MS 251, MS 251 C Always install new hoses - Improper handling may result in the instruction manual. The high voltages which components are not... Do not smoke or bring any fire, flame or other source of STIHL press fluid, b 14. Avoid damaging the hose barb - do not use original STIHL replacement parts. Preparations for servicing Remove the chain sprocket cover, saw chain and guide bar before re-installing - Fuel system -
... press fluids are heated for assembly or disassembly. replace as the safety precautions and warnings in damage to overheating. 4 MS 231, MS 231 C, MS 251, MS 251 C Always install new hoses - Improper handling may result in the instruction manual. The high voltages which components are not... Do not smoke or bring any fire, flame or other source of STIHL press fluid, b 14. Avoid damaging the hose barb - do not use original STIHL replacement parts. Preparations for servicing Remove the chain sprocket cover, saw chain and guide bar before re-installing - Fuel system -
Instruction Manual
Page 9
... under full load Cause Clutch shoes badly worn Clutch drum badly worn Remedy Install new clutch Install new clutch drum Saw chain rotates at idle speed Engine idle speed too high Clutch springs stretched Clutch springs broken Readjust idle speed screw LA Replace the clutch springs or ... Clutch shoe retainer broken Clutch shoes and carrier worn Replace all clutch springs Fit new needle cage Install new retainer or clutch Install new clutch 8 MS 231, MS 231 C, MS 251, MS 251 C
... under full load Cause Clutch shoes badly worn Clutch drum badly worn Remedy Install new clutch Install new clutch drum Saw chain rotates at idle speed Engine idle speed too high Clutch springs stretched Clutch springs broken Readjust idle speed screw LA Replace the clutch springs or ... Clutch shoe retainer broken Clutch shoes and carrier worn Replace all clutch springs Fit new needle cage Install new retainer or clutch Install new clutch 8 MS 231, MS 231 C, MS 251, MS 251 C
Instruction Manual
Page 10
... drum badly worn Brake band blocked Install new clutch Install new clutch drum Check freedom of movement and operation of brake band Saw chain rotates at idle speed Engine idle speed too high Clutch springs stretched Clutch springs broken Readjust idle speed screw LA 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 C 9
... drum badly worn Brake band blocked Install new clutch Install new clutch drum Check freedom of movement and operation of brake band Saw chain rotates at idle speed Engine idle speed too high Clutch springs stretched Clutch springs broken Readjust idle speed screw LA 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 C 9
Instruction Manual
Page 17
... incorrect - throttle shutter completely closed Tank vent faulty Clean the carburetor Reset low speed screw (L) correctly Reset idle speed screw (LA) correctly Replace tank vent Saw chain rotates at idle speed Leak on fuel hose from tank to carburetor Seal connections or install new fuel hose Engine idle speed too high Readjust... screw LA (counterclockwise) Clutch springs stretched or fatigued Replace the clutch springs or install new clutch Clutch spring hooks broken Replace the clutch springs 16 MS 231, MS 231 C, MS 251, MS 251 C
... incorrect - throttle shutter completely closed Tank vent faulty Clean the carburetor Reset low speed screw (L) correctly Reset idle speed screw (LA) correctly Replace tank vent Saw chain rotates at idle speed Leak on fuel hose from tank to carburetor Seal connections or install new fuel hose Engine idle speed too high Readjust... screw LA (counterclockwise) Clutch springs stretched or fatigued Replace the clutch springs or install new clutch Clutch spring hooks broken Replace the clutch springs 16 MS 231, MS 231 C, MS 251, MS 251 C
Instruction Manual
Page 21
... the machine. 20 MS 231, MS 231 C, MS 251, MS 251 C to the eye. Remove the clutch drum, b 4.1 - Starting the engine 2 1 - Troubleshooting, b 3.2 - Engage the chain brake. 5. The braking time is in terms of the chain braking time, i.e. Remove the brake band without overstretching it from the underside of the saw . the chain must come areas on the chain saw chain (less than a second...
... the machine. 20 MS 231, MS 231 C, MS 251, MS 251 C to the eye. Remove the clutch drum, b 4.1 - Starting the engine 2 1 - Troubleshooting, b 3.2 - Engage the chain brake. 5. The braking time is in terms of the chain braking time, i.e. Remove the brake band without overstretching it from the underside of the saw . the chain must come areas on the chain saw chain (less than a second...
Instruction Manual
Page 97
...Saw chain runs while engine is correct) Idle setting too lean. - Check standard setting. - Warm up the engine. Inspect the spark arresting screen (if fitted) and clean or replace if necessary, b 3.7 or b 6.1 2310RA285 TG - Engine stops while idling - Adjustment for the standard setting. The setting of lubrication and overheating. 96 MS 231, MS 231 C, MS 251, MS 251... C Warm up the engine. - Turn low speed screw (L) counterclockwise until the chain starts running , then turn it back...
...Saw chain runs while engine is correct) Idle setting too lean. - Check standard setting. - Warm up the engine. Inspect the spark arresting screen (if fitted) and clean or replace if necessary, b 3.7 or b 6.1 2310RA285 TG - Engine stops while idling - Adjustment for the standard setting. The setting of lubrication and overheating. 96 MS 231, MS 231 C, MS 251, MS 251... C Warm up the engine. - Turn low speed screw (L) counterclockwise until the chain starts running , then turn it back...