Chain Sprocket Cover Assy Repair Kits For Stihl MS260 MS270 029 MS290 034 036 039 MS310 MS360 MS380 MS381 MS382 MS390 044 MS440 046 MS460 MS660 MS640 066 OEM#1122 640 1702
Chain Sprocket Cover Assy Repair Kits Fit For Stihl MS260 MS270 029 MS290 034 036 039 MS310 MS360 MS380 MS381 MS382 MS390 044 MS440 046 MS460 MS660 MS640 066 OEM#1122 640 1702
Chain Sprocket Cover Assy Repair Kits Fit For Stihl MS260 MS270 029 MS290 034 036 039 MS310 MS360 MS380 MS381 MS382 MS390 044 MS440 046 MS460 MS660 MS640 066 OEM#1122 640 1702
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Chain Sprocket Cover Assy Repair Kits For Stihl MS260 MS270 029 MS290 034 036 039 MS310 MS360 MS380 MS381 MS382 MS390 044 MS440 046 MS460 MS660 MS640 066 OEM#1122 640 1702Chain Sprocket Cover Assy Repair Kits Fit For Stihl MS260 MS270 029 MS290 034 036 039 MS310 MS360 MS380 MS381 MS382 MS390 044 MS440 046 MS460 MS660 MS640 066 OEM#1122 640 1702Chain Sprocket Cover Assy Repair Kits Fit For Stihl MS260 MS270 029 MS290 034 036 039 MS310 MS360 MS380 MS381 MS382 MS390 044 MS440 046 MS460 MS660 MS640 066 OEM#1122 640 1702

Chain Sprocket Cover Assy Repair Kits Fit For Stihl MS260 MS270 029 MS290 034 036 039 MS310 MS360 MS380 MS381 MS382 MS390 044 MS440 046 MS460 MS660 MS640 066 OEM#1122 640 1702

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1pc Chip Guard, OEM:1125 656 1501

2pcs Bumper Strip, OEM:1121 648 6610

1pcs Chain sprocket cover, OEM:1125 640 1701

 

**Compatibility**:  
Fit for STIHL 024 026 028 029 034 036 038 039 MS260 MS270 MS290 MS310 MS380 MS381 MS390 044 046 064 066 MS440 MS460 MS650 MS660

We provide all replacement parts for 660 series chainsaws including guide bars, pistons, starters and more. 

FAQS

Cold Start
  1. Add fuel (fuel mixing ratio: 25:1).
  2. Close the choke. If the machine is equipped with a primer bulb, press it 3–5 times until the bulb is filled with fuel.
  3. Pull the starter rope 3–5 times.
  4. After hearing two “coughing” sounds,
  5. Open the choke.
  6. Pull the starter rope to start the machine.
Hot Start
  1. Open the choke.
  2. Pull the starter rope to start the machine.

The issue may be caused by an incorrect fuel mixture, spark plug problems, or a clogged carburetor.

  1. Check whether the fuel mixing ratio is 25:1. If not, adjust the fuel mixture to 25:1.
  2. Check whether the fuel line is bent or blocked.
  3. Check whether the spark plug is sparking properly.
  4. Check whether the engine is flooded.
  5. Check whether there is a carburetor malfunction.
  1. Confirm whether the spark plug is producing a spark: Remove the spark plug, connect it to the ignition coil, and place the spark plug electrode in contact with a metal part of the machine. Pull the starter rope and observe whether the spark plug produces a spark during starting.
  2. Check the electrode gap. The correct gap is 0.5–0.7 mm (approximately the thickness of a credit card).
  3. Clean oil residue and debris from the surface of the spark plug.
  4. If the engine still does not start after completing the above steps, replace the spark plug with a new one.
  5. Check whether the high-voltage wire (ignition coil lead) is damaged.
  1. Remove the spark plug.
  2. Turn the machine upside down.
  3. Pull the starter rope.
  4. Drain the excess fuel from the cylinder.
  1. Remove the air filter.
  2. Use an air blower to remove dust or debris from the air filter.
  3. If it cannot be cleaned or has been used for a long time, replace the air filter.

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