Stihl MS 251 CB-E Support Question
Stihl MS 251 CB-E Support Question
Find answers below for this question about Stihl MS 251 CB-E.Need a Stihl MS 251 CB-E manual? We have 1 online manual for this item!
Question posted by derickallen2424 on January 26th, 2016
Throttle Trigger
My throttle trigger is sticking when I pull it. My saw is running full tbrottle. Please tell me how to fix. Need to be cutting now!
Current Answers
Answer #1: Posted by Odin on January 26th, 2016 8:16 AM
Odin
Member since:
April 10th, 2010 Points: 41,236,670
Member since:
April 10th, 2010 Points: 41,236,670
See if this video will help: https://www.youtube.com/watch?v=e3ZoBqhh5rI
Hope this is useful. Please don't forget to click the Accept This Answer button if you do accept it. My aim is to provide reliable helpful answers, not just a lot of them. See https://www.helpowl.com/profile/Odin.
Answer #2: Posted by smmyb123 on February 2nd, 2016 6:02 PM
smmyb123
Member since:
January 30th, 2016 Points: 1,510
Member since:
January 30th, 2016 Points: 1,510
Your chainsaw has a "twist bump" style throttle linkage. Pull off the air filter cover and inspect the operation of this linkage on the right side of the carb. There may be debris clogging things up or the linkage could have been overworked and snapped out of place. Also, check to make sure you dont have the Multi-function lever (kill/ choke switch) set to half choke.
Related Stihl MS 251 CB-E Manual Pages
Instruction Manual - Page 2
...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. Introduction and
Safety Precautions 3
1.1 Introduction
3
1.2 Safety ...
10.1.1 Removing and
Installing
71
10.2 Throttle Trigger/
Lockout Lever
72
10.3 Throttle Trigger/
Lockout Lever -
Instruction Manual - Page 3
...
the Carburetor
90
12.6.1 Metering Diaphragm 90
12.6.2 Inlet Needle
90
12.6.3 Pump Diaphragm
91
12.6.4 Lever on
Throttle Shaft
92
12.6.5 Adjusting Screws
93
12.7 Adjusting
the Carburetor
95
12.7.1 Basic Setting
95
12.7.2 Standard setting
96...11.2 Fuel Hose
101
12.11.3 Fuel Hoses - Servicing Aids
112
2
MS 231, MS 231 C, MS 251, MS 251 C Special Servicing Tools 110
14.
Instruction Manual - Page 17
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 ...Clutch spring hooks broken
Replace the clutch springs
16
MS 231, MS 231 C, MS 251, MS 251 C Condition
Cause
Remedy
Engine will not idle, idle speed too Throttle shutter opened too wide by Reset idle speed ...
Instruction Manual - Page 18
... low power
Remedy
Clean air filter or replace if necessary
Throttle shutter not opened fully Tank vent faulty
Check throttle rod Replace tank vent
Fuel pickup body dirty
Install new pickup...Engine running extremely rich, has Choke shutter does not open no power and a very low maximum speed
Check carburetor and choke shaft, service or replace if necessary
MS 231, MS 231 C, MS 251, MS 251 C...
Instruction Manual - Page 19
...-
Carburetor - Engine does not deliver full power Piston rings worn or broken or runs erratically
Muffler / spark arresting screen carbonized
Air filter dirty
Fuel hose kinked or torn...Air inlet in engine damaged at idle speed, but operates normally at full throttle
Engine pan leaking or damaged (cracks)
Intake manifold damaged / bore blocked...housing
18
MS 231, MS 231 C, MS 251, MS 251 C
Instruction Manual - Page 21
... of the chain braking time, i.e. With the chain brake released, open the throttle wide and let go of the saw chain coming to an abrupt stop .
2310RA007 TG
1
: Remove the screw ... surfaces of the brake band and clutch drum impair the coefficient of the machine.
20
MS 231, MS 231 C, MS 251, MS 251 C to one of outside diameter - Its efficiency is imperceptible to troubleshooting, b 3.2. ...
Instruction Manual - Page 28
...12.5
- Check the brake cable (1) and retainer (2), replace if necessary
MS 231, MS 231 C, MS 251, MS 251 C
27 Remove the switch lever, b 10.3.1
2
- Turn adjusting ...Pull out the brake cable (1) a little and disconnect it in the
reverse sequence.
: Take out the screw (1).
5.4.2 Brake cable Removing and Installing
: Remove the retainer (2) with brake cable.
- Remove the throttle trigger...
Instruction Manual - Page 30
Check position of fuel return hose and correct if necessary, b 12.11.3
- Troubleshooting, b 3.2
2 3
- Install the throttle trigger, b 10.3
MS 231, MS 231 C, MS 251, MS 251 C
29 Install the switch lever, b 10.3.1
- 1
2
1
2
- if this is visible.
: Take out the screw (3).
: Pull out the spur gear (2) and tensioner slide (1).
1
2310RA063 TG
: Position the brake cable (1) in the ...
Instruction Manual - Page 34
...
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 The engine can be modified as shown. Flange (1) 4224 893 2501 can be checked... from idle speed to part or full throttle is in castings are the usual causes of the prescribed idle speed difficult, if not impossible. Pull off the boot and unscrew the spark ...
Instruction Manual - Page 73
...may pop out.
- note the installed position (arrow).
72
MS 231, MS 231 C, MS 251, MS 251 C
Inspect the lockout lever, throttle trigger and torsion spring, replace as necessary. with torsion spring (4).
Installing
: Attach the throttle rod (1) to the throttle trigger (2) and fit it is within the handle and the holes in the throttle trigger and handle are in alignment.
: Use a drift (2) to...
Instruction Manual - Page 74
...TG
1
: To remove the handle molding, press the tabs (1) on throttle trigger turns freely, replace trigger if necessary.
- Check operation
2
1
- Push down the handle molding (1) until it from the throttle trigger (2).
2
2310RA176 TG
5902RA307 TG
2310RA177 TG
1
: Attach the torsion spring....
1
: Use a drift (2) to the lockout lever (arrow). MS 231, MS 231 C, MS 251, MS 251 C
73
Instruction Manual - Page 75
... torsion spring (1) to drive out the pin (arrow).
2 1
1
2310RA185 TG
2310RA181 TG
2310RA174 TG
The brake cable (1) must be below the drift - Lubricate roller on throttle trigger with grease after disassembly.
- Installing
2
31 1
- Push down .
: Lift the switch lever (1) a little, turn it if necessary
74
MS 231, MS 231 C, MS 251, MS 251 C
Instruction Manual - Page 77
... of the buffer (2).
2
- Remove the baffle, b 12.2
1
2
1
2310RA196 TG
: Pull the short circuit wire (1) and ground wire (2) out of the buffer (2).
76
MS 231, MS 231 C, MS 251, MS 251 C Put the filter base to "F",
hold it in the : Pull the filter base (1) off the
1
guide (arrow). Remove the throttle trigger,
b 10.2,
QuickStop Super, b 10.3
2310RA197 TG
1
: Engage the choke...
Instruction Manual - Page 78
... TG
2310RA298 TG
: Carefully pull the carburetor (1) off the studs - All models
-
Install the throttle trigger, b 10.2
1
1
2310RA294 TG
2310RA297 TG
2310RA199 TG
: Remove the fuel hose (1). All models
1
: Pass the throttle cable (1) through the opening (arrow) in the direction of the rear handle.
1
2
: Fit the new fuel hose (1).
MS 231, MS 231 C, MS 251, MS 251 C
77
Instruction Manual - Page 84
... Pull the rubber grommet (1) and wiring harness out of manifold flange.
- Remove the throttle rod, b 10.3.4
1
: Push the grommet (arrow) of the air guide shroud.
- Pull the... Guide Shroud
- Installing
2310RA324 TG
- Pull the fuel hose out of the fuel hose (1) downwards and out.
2310RA321 TG
-
MS 231, MS 231 C, MS 251, MS 251 C
83 Pull out the shutter , check it to ...
Instruction Manual - Page 85
...arrow) butts against the manifold flange.
2
- Reassemble all other parts in
position and pull the grommet of
2
3
fuel hose (2) into the bore (arrow) until it ... (2) firmly.
- Install the carburetor carrier, b 12.8
2310RA328 TG
2
- Install the throttle rod, b 10.3.4
- : Place the air guide shroud (1) in the reverse sequence.
....5
84
MS 231, MS 231 C, MS 251, MS 251 C
Instruction Manual - Page 86
... side with the wiring harness still attached, b 12.3
- Remove the throttle rod, b 10.3.4
: Pull the fuel return hose (1) out of the guides (arrows).
: Ease the...TG
2310RA332 TG
2310RA334 TG
: Pull the wiring harness and rubber grommet (1) out of the cylinder and pull the air guide shroud away at the same time.
2310RA338 TG
MS 231, MS 231 C, MS 251, MS 251 C
85 Put the wiring harness ...
Instruction Manual - Page 88
...
- Coat the grommet with STIHL press fluid to pull the manifold flange (1) through the intake opening while pushing the air guide shroud (3) against the stop .
Position the fuel return hose snugly - Install the carburetor carrier,
2
b 12.8
1 - 1
1
2
2310RA343 TG 2310RA345 TG 2310RA348 TG
2
2
1
3
- Install the throttle rod, b 10.3.4
- MS 231, MS 231 C, MS 251, MS 251 C
87
Instruction Manual - Page 90
...on the nipple.
- Test the tank vent if necessary, b 12.10.1
- Set throttle trigger to full throttle
position, the throttle shutter must
be tested for leaks with the pump 0000 850 1300.
: Push the ...in the reverse sequence.
MS 231, MS 231 C, MS 251, MS 251 C
89 If this pressure remains constant, the carburetor is sticking, remove to vent the system and then pull the fuel hose off ...
Instruction Manual - Page 93
...holes in the reverse sequence.
: Remove the retaining ring (1). : Pull off the lever (2).
92
MS 231, MS 231 C, MS 251, MS 251 C Fit the end cover (1) from below
so that the pump ...The diaphragm material is subjected to continuous alternating stresses and eventually shows signs of the throttle and choke shaft levers.
2
2310RA267 TG 2310RA269 TG
2310RA271 TG
: Use a needle to be...
Similar Questions
Squealing Noise
The chain saw head of my Stihl pole saw squeals horrendously when depressing the throttle. The chain...
The chain saw head of my Stihl pole saw squeals horrendously when depressing the throttle. The chain...
(Posted by wrexrus 3 years ago)
Stihl Fs 55 Throttle Trigger Lockout Replacement.
I have broken the throttle trigger lockout on my Stihl FS 55 Trimmer...is this difficult to replace....
I have broken the throttle trigger lockout on my Stihl FS 55 Trimmer...is this difficult to replace....
(Posted by dorydan 7 years ago)
Part No For Stihl Km90r On/of Switch
i require 1 new on/of switch for my stihl km90r want part no or where it can be purchased its orange...
i require 1 new on/of switch for my stihl km90r want part no or where it can be purchased its orange...
(Posted by johnnash222 8 years ago)
