Instruction Manual
Page 2
... Brake Band 20 5.3 Brake Lever 21 5.4 Brake Lever on Filter Base 69 Handlebar 69 10. Models with QuickStop Super 24 5.4.1 Adjusting the brake cable 26 5.4.2 Brake cable Removing and Installing 27 5.5 Chain Tensioner 29 5.5.1 Quick Chain Tensioner 30 5.5.2 Chain Catcher 30... 9.4 AV Spring on Oil Tank 66 AV Spring on Fuel Tank 66 AV Spring on Handlebar 67 Stop Buffers 68 Buffers on Machines with Manual Fuel Pump 85 12.5 Carburetor 88 12.5.1 Leakage Test 89 RA_737_00_01_01 MS 231, MS 231 C, MS 251, MS 251 C q © ANDREAS STIHL AG & Co. Fuel...
... Brake Band 20 5.3 Brake Lever 21 5.4 Brake Lever on Filter Base 69 Handlebar 69 10. Models with QuickStop Super 24 5.4.1 Adjusting the brake cable 26 5.4.2 Brake cable Removing and Installing 27 5.5 Chain Tensioner 29 5.5.1 Quick Chain Tensioner 30 5.5.2 Chain Catcher 30... 9.4 AV Spring on Oil Tank 66 AV Spring on Fuel Tank 66 AV Spring on Handlebar 67 Stop Buffers 68 Buffers on Machines with Manual Fuel Pump 85 12.5 Carburetor 88 12.5.1 Leakage Test 89 RA_737_00_01_01 MS 231, MS 231 C, MS 251, MS 251 C q © ANDREAS STIHL AG & Co. Fuel...
Instruction Manual
Page 8
... for polymer: DG and P screws max. 500 rpm Do not use an impact wrench for releasing or tightening screws. MS 231, MS 231 C, MS 251, MS 251 C 7 Tighten the screw clockwise to the specified torque. This procedure ensures that the screw engages properly in the hole....0 4.5 11.0 1), 3) Remarks: 1) Screws with binding head 2) Micro-encapsulated screws 3) Waxed screws 4) Degrease crankshaft/flywheel and mount oil-free Q) QuickStop Super B) Quick chain adjuster Use the following procedure when refitting a DG or P screw in an existing thread: Place the screw in the existing thread and does ...
... for polymer: DG and P screws max. 500 rpm Do not use an impact wrench for releasing or tightening screws. MS 231, MS 231 C, MS 251, MS 251 C 7 Tighten the screw clockwise to the specified torque. This procedure ensures that the screw engages properly in the hole....0 4.5 11.0 1), 3) Remarks: 1) Screws with binding head 2) Micro-encapsulated screws 3) Waxed screws 4) Degrease crankshaft/flywheel and mount oil-free Q) QuickStop Super B) Quick chain adjuster Use the following procedure when refitting a DG or P screw in an existing thread: Place the screw in the existing thread and does ...
Instruction Manual
Page 15
...or replace spark plug if necessary. 14 MS 231, MS 231 C, MS 251, MS 251 C key in flywheel has sheared off Install new flywheel Weak magnetization in ignition lead or short circuit. too much oil Use correct mixture of fuel and oil Incorrect air gap between ignition Set air gap...new spring if necessary Spark plug sooted, smeared with oil Clean the spark plug or replace if necessary. 3.5 Ignition System Condition Engine runs roughly, misfires, temporary loss of adjustment - If sooting keeps recurring, check air filter Fuel/oil mixture - Check ignition lead/module, replace ignition ...
...or replace spark plug if necessary. 14 MS 231, MS 231 C, MS 251, MS 251 C key in flywheel has sheared off Install new flywheel Weak magnetization in ignition lead or short circuit. too much oil Use correct mixture of fuel and oil Incorrect air gap between ignition Set air gap...new spring if necessary Spark plug sooted, smeared with oil Clean the spark plug or replace if necessary. 3.5 Ignition System Condition Engine runs roughly, misfires, temporary loss of adjustment - If sooting keeps recurring, check air filter Fuel/oil mixture - Check ignition lead/module, replace ignition ...
Instruction Manual
Page 34
...engine and upset the fuel-air mixture. 2310RA072 TG 2310RA074 TG 6.2 Leakage Test Defective oil seals and gaskets or cracks in place. 2310RA079 TG a 2710RA164 TG 2310RA073 TG MS 231, MS 231 C, MS 251, MS 251 C 33 Always perform the vacuum test first and then the pressure test. Moreover, the...6.1 1 2 2 : Fit the test flange (1) 5910 855 4201 on cylinder exhaust port. : Fit the screws (2) - Remove the carburetor, b 12.5 - This makes adjustment of leaks. Pull off the boot and unscrew the spark plug. a = 13 mm b = 39.25 mm c = 6 mm - Remove the shroud, b 6.4 c 1 1 b -
...engine and upset the fuel-air mixture. 2310RA072 TG 2310RA074 TG 6.2 Leakage Test Defective oil seals and gaskets or cracks in place. 2310RA079 TG a 2710RA164 TG 2310RA073 TG MS 231, MS 231 C, MS 251, MS 251 C 33 Always perform the vacuum test first and then the pressure test. Moreover, the...6.1 1 2 2 : Fit the test flange (1) 5910 855 4201 on cylinder exhaust port. : Fit the screws (2) - Remove the carburetor, b 12.5 - This makes adjustment of leaks. Pull off the boot and unscrew the spark plug. a = 13 mm b = 39.25 mm c = 6 mm - Remove the shroud, b 6.4 c 1 1 b -
Instruction Manual
Page 111
... piston pin Adjusting air gap between the ignition module and flywheel Installing rewind spring Attaching springs Leakage Test Protecting the oil seal (clutch side) Installing oil seal (clutch side/ignition side) Spark plug 1) Protecting the oil seal (ignition side) Clamping machine to assembly stand Testing ignition system Testing ignition system 110 MS 231, MS 231 C, MS 251, MS 251 C Description...
... piston pin Adjusting air gap between the ignition module and flywheel Installing rewind spring Attaching springs Leakage Test Protecting the oil seal (clutch side) Installing oil seal (clutch side/ignition side) Spark plug 1) Protecting the oil seal (ignition side) Clamping machine to assembly stand Testing ignition system Testing ignition system 110 MS 231, MS 231 C, MS 251, MS 251 C Description...
Instruction Manual
Page 112
...MS 231, MS 231 C, MS 251, MS 251 C 111 Removing bar mounting studs Removing flywheel Add-on clutch shoes Holding saw for releasing only. Jaws (No. 3.1) - Sealing exhaust port for leakage test 0.5 to 18 Nm 6 to 80 Nm Installing hookless snap rings in piston Sleeve for installing tool 10 Adjusting... the carburetor IS-P screws Detaching springs on for screwdriver (adjusting carburetor) Removing pickup body Remarks: 1) Use for repairs Removing oil seals Removing oil seals Removing oil seals Pull off the limiter cap.
...MS 231, MS 231 C, MS 251, MS 251 C 111 Removing bar mounting studs Removing flywheel Add-on clutch shoes Holding saw for releasing only. Jaws (No. 3.1) - Sealing exhaust port for leakage test 0.5 to 18 Nm 6 to 80 Nm Installing hookless snap rings in piston Sleeve for installing tool 10 Adjusting... the carburetor IS-P screws Detaching springs on for screwdriver (adjusting carburetor) Removing pickup body Remarks: 1) Use for repairs Removing oil seals Removing oil seals Removing oil seals Pull off the limiter cap.
