Question about Stihl MS171 14" Chainsaw

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Why does the chainsaw brake not work?

The brake lever does not "click" as described in the IFU's and consequently the brake is permanently disengaged.

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There is a tap may be broken or spring is off

Posted on May 10, 2014

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That is one area you do not want to mess around with. For safety sake, take it to the service center and have an analysis done and professionaly repaired.

Posted on May 10, 2014

  • Curtis Charlton
    Curtis Charlton Jun 04, 2014

    take the cover off as if you were changing the chain or bar the bre and is in that cover check it's function and be sure the brake band is secured in it's place and the brake handle locks it there me sure this cover is clean so toucan see everything you my have a stick jammed in there if tis desn't work it may be neccesary to replace some parts.... a dealer may be required at this time

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2 Answers

My chainsaw wont start.


check the position of the safety lever /clutch as there may be a micro switch that will not allow it to start with the chain engaged

Apr 30, 2015 | Poulan Pro Pp5020av 20-inch 50cc 2 Stroke...

1 Answer

Why does the chain brake not work?


1. What is the make and model of the saw?
2. Does it make any sound when you push the chainbrake handle towards the front (the bar and chain direction)?
3. The idea, and the way it works is that as the bar and chain get jerked upwards towards your face, your left wrist catches the chainbrake handle and pushes it forward thus engaging the chainbrake.

May 10, 2014 | Stihl Garden

1 Answer

Mulcher repair


follow this steps and fix it. God bless you

Clutch

If the chainsaw chain does not engage the clutch assembly might be worn out. The clutch is similar to an automotive clutch. The chain sprocket is attached to the clutch drum and there are clutch pads underneath. As the pads wear out the clutch assembly no longer engages with the motor and the chain does not engage either.

Clutch Band kit

Chainsaws are equipped with a clutch band, a steel band that wraps around the clutch drum and is activated by the emergency stop lever. If the lever does not disengage the chain does not engage. Check to be sure the stop lever is disengaged. Adjust the clutch band if necessary.
Enter your model number to see parts for your chainsaw.
Help me find my model number picunavailable175.jpg

Drum Brake

Chainsaws are equipped with a clutch band drum brake, a steel band that wraps around the clutch drum and is activated by the emergency stop lever. If the lever does not disengage the chain does not engage. Check to be sure the stop lever is disengaged. If necessary, adjust the clutch band drum brake.5bf7a198-4466-44ee-8866-ccfc5b95f0ac.jpg

Nov 24, 2013 | Garden

1 Answer

There is a click in the shift lever area when i start the engine and press the brake pedal


this is a safety feature that maybe going bad. you should NOT be able to put the car in gear without the brake on. this is controlled by a solenoid in the shift lever. the sound you here is it disengaging so that you can move the lever. it may be loose or worn so it is "clicking" when it actuates. If it is still working correctly just keep an eye on it a plan for a replacement when it gets worse.

Nov 18, 2011 | 1991 Honda Accord

1 Answer

Chain will not turn when on or off


Sounds like the chain brake may be engaged. You should have a lever that looks somewhat like a handguard on the top of the chainsaw, right in front of the handle you hold the saw with. It should "snap" when you disengage the chain brake by pulling the lever back towards you.

You can find replacement chainsaw parts at PartsBuggy.com.

Sep 15, 2011 | Husqvarna , No.455 Rancher, 20" Gas -...

1 Answer

Chain on chainsaw will not turn at all when on or off


Sounds like the chain brake may be engaged. You should have a lever that looks somewhat like a handguard on the top of the chainsaw, right in front of the handle you hold the saw with. It should "snap" when you disengage the chain brake by pulling the lever back towards you.

You can find replacement chainsaw parts at PartsBuggy.com.

Sep 15, 2011 | Garden

1 Answer

I have a Spear & Jackson 2000 watt electric chainsaw. The clutch seems to be getting weaker and weaker, so that if the chain is impeded at all, it just jams and the drive disengages. If I turn off the...


there is no clutch in the drive
just a simple in-out dog engagement
pull the lever back engages the drive and pushing it forward disengages the drive
uncaring operators generally disengage the dog and start the electric motor before engaging the dog and then pull to engage while the motor is spinning
, that action damages the teeth of the dog which results in what you describe
depending on the age of the chainsaw , parts may be available from the service agent or manufacturer spares

Sep 06, 2017 | Garden

1 Answer

No spark to plugs


1990 Buick REATTA Recall ID from NHTSA: 90V164000 Auto Recall Date: 09/06/1990
Vehicle Component: POWER TRAIN:AUTOMATIC TRANSMISSION:LEVER AND LINKAGE:FLOOR SHIFT
Estimated Vehicles Affected: 63964
1990 BUICK REATTA Defect Summary:
TRANSAXLE SHIFT CONTROL CABLE MAY DISENGAGE FROM THE FROM THE FLOOR SHIFT CONTROL WITH LOSS OF GEAR INDICATOR REFERENCE AND SHIFT SELECTOR OPERATION.
Defect Consequence:
DRIVER WOULD NOT BE ABLE TO DETERMINE ACTUAL GEARPOSITION THE TRANSAXLE IS IN, WHICH COULD RESULT IN UNEXPECTED VEHICLE MOVEMENTAND AN ACCIDENT WITHOUT PRIOR WARNING.
Remedy:
INSTALL A TRANSAXLE SHIFT CONTROL CABLE RETAINING CLIP TO PREVENT CABLE DISENGAGEMENT.
Notes: GENERAL MOTORS CORP., 1990 Buick REATTA Recall ID from NHTSA: 91V158000 Auto Recall Date: 09/13/1991
Vehicle Component: SERVICE BRAKES, HYDRAULIC:SWITCHES:BRAKE WARNING
Estimated Vehicles Affected: 18904
1990 BUICK REATTA Defect Summary:
BRAKE INDICATOR LIGHT MAY NOT LIGHT WHEN IGNITION IS IN THE "ON" POSITION, THE PARKING BRAKE IS APPLIED, AND THE SHIFT SELECTOR IS IN THE PARK OR NEUTRAL GEAR RANGE.
Defect Consequence:
VEHICLES WOULD NOT MEET THE REQUIREMENTS OF FMVSS 101AND 105.
Remedy:
REPLACE THE PROM IN THE BODY COMPUTER MODULE TO PREVENT THIS CONDITION FROM OCCURRING.
Notes: GENERAL MOTORS CORP., 1990 Buick REATTA Recall ID from NHTSA: 90V031000 Auto Recall Date: 02/12/1990
Vehicle Component: AIR BAGS:FRONTAL:SENSOR/CONTROL MODULE
Estimated Vehicles Affected: 857
1990 BUICK REATTA Defect Summary:
THE FORWARD SENSOR FOR THE AIR BAG MAY HAVE BEEN INCORRECTLY CONSTRUCTED WITH PART OF THE WIRING HARNESS TO THE SENSOR REVERSED.
Defect Consequence:
THE REVERSAL OF THE WIRES COULD CAUSE DELAY IN THE DEPLOYMENT OF THE AIR BAG AND INCREASE THE SEVERITY OF THE OF INJURY TO AN UNBELTED DRIVER IN AN ACCIDENT.
Remedy:
REPLACE FORWARD DISCRIMINATING SENSOR AS NECESSARY.
Notes: GENERAL MOTORS CORP.

Dec 03, 2010 | 1990 Buick Reatta

1 Answer

I have a Homelite Chainsaw 45cc Power Stroke. Model No. UT10946D. The chain brake is always applied. Brake lever will not latch in the released position. I've disassembled it and do not see anything...


I have the same model (ut10946d) and used it for less than 2 tanks of gas when the chain froze. I noticed it was slowing down and it seemed like the chain brake was not disengaging and staying in the "unlocked" position.
I took the tool apart today and found that the band that rubs on the clutch to stop the chain was dragging on the clutch because it doesn't disengage all the way. The heat from the friction melted the plastic parts around the clutch housing and crankshaft. So now I have a chainsaw that I bought new, used for less than an hour, and is now junk due to poor design and/or product control.

I WILL NEVER BUY ANOTHER HOMELITE GAS POWERED TOOL AS LONG AS I LIVE. THEY ARE PURE JUNK!

My solution, call homelite and complain about it, maybe they'll stand behind their design flaws - but I doubt it.

Jun 18, 2010 | Garden

2 Answers

The shift does not disengage when brake is down and ignition is on. How do I disengage the car from park to have it flatbed towed?


There is a hex on the shifter that has to be removed and punch a screw driver through the hole to release the parking cylinder

Jun 10, 2010 | 1995 Jaguar XJ6

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