Stihl MS 311 Support Question
Stihl MS 311 Support Question
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Question posted by skihaus1 on November 19th, 2020
No Spark
We have replaced the coil pack and spark plug but still no spark. We checked the ignition switch to be sure it's in the on position
Current Answers
Answer #1: Posted by Odin on November 19th, 2020 4:49 PM
Odin
Member since:
April 10th, 2010 Points: 41,236,640
Member since:
April 10th, 2010 Points: 41,236,640
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.
Related Stihl MS 311 Manual Pages
Product Instruction Manual - Page 3
...38
Spark Plug
39
Replacing the Starter Rope and
Rewind Spring
40
Storing the Machine
42
Checking and Replacing the Chain
Sprocket
43
Maintaining and Sharpening the
Saw Chain
44
Maintenance and Care
47
{
Main Parts Specifications Special Accessories Ordering Spare Parts Maintenance and Repairs STIHL Incorporated Federal Emission Control Warranty Statement Trademarks
MS 311, MS 391...
Product Instruction Manual - Page 8
...trigger lockout, stop switch and cutting tool....MS 311, MS 391
Check that could ignite combustible fumes and cause a fire.
STIHL Oilomatic chain, guide bar and sprocket must be used as possible.
Check...extremely important.
Before replacing any bar and ... attempt to the idle position. For proper assembly of...spark plug boot is shut off the engine and then tighten.
Always make sure...
Product Instruction Manual - Page 12
...sawing, make sure that you...or excessive wear. Replace damaged, broken or...spark plug) become hot during normal operation may occur if the throttle is depressed for a short period after stopping the engine.
Do not operate your STIHL servicing dealer only.
10
MS 311, MS...switch off , damage the saw chain or cause the saw chain does not touch any combustible substances. Always stop switch...
Product Instruction Manual - Page 24
...spark plug and make sure it and the ignition lead are always clean and in the boot may create arcing that the risk of forest fires is used and other injuries, it inoperable. Never test the ignition system with the spark plug...; replace worn...spark plug or with a spark-arresting screen to reduce the risk of fire, never operate your STIHL chain saw in the instruction manual).
22
MS 311, MS...
Product Instruction Manual - Page 32
... powdered or drifting snow.
engine off Operating position F - this position is for starting the cold engine
30
MS 311, MS 391
this position is for starting , bring the engine up to use of the cover plate is squeezed Cold start n -
ignition is running or can start Warm start l - engine is switched off - after starting the warm engine - English...
Product Instruction Manual - Page 35
... the combustion chamber
N Replace the spark plug - Once the engine is released - even if the engine is ready for winter operation, see "Spark plug"
N Set the Master Control lever to the stop position 0
N Remove the spark plug - Open the throttle only when the chain brake is off engine
N Press the button on (saw is cold
MS 311, MS 391
33
the...
Product Instruction Manual - Page 39
... an optimum fuel-air mixture under most operating conditions. Standard setting
MS 311, MS 391
LA
N Shut off the engine N Check the air filter and clean or
replace if necessary.
N Check the spark arresting screen
(country-specific) in the muffler and clean or replace if necessary.
37 carburation, ignition, timing and valve or port timing) without the addition of...
Product Instruction Manual - Page 41
... deposits to the stop position 0
N Push the hand guard forwards - N Use only resistor type spark plugs of the spark plug. operating at part throttle etc.) affect the condition of the approved range. Wrong fuel mix (too much oil in the gasoline), a dirty air filter and unfavorable running conditions,
e.g.
MS 311, MS 391
39 N Clean dirty spark plug. N Dirty air filter...
Product Instruction Manual - Page 42
... that could ignite combustible fumes and cause a fire.
4903BA008 KN
Replacing the Starter Rope and Rewind Spring
Remove shroud
N Move the Master Control lever to the stop position 0
N Push the hand guard forwards - To reduce the risk of the fan housing away from the crankcase and remove downwards
4903BA005 KN
40
MS 311, MS 391
the...
Product Instruction Manual - Page 49
... oil tank
Clean
X
Chain Lubrication
Check
X
Inspect, also check sharpness
X
X
Saw chain
Check chain tension
X
X
Sharpen
X
Check (wear, damage)
X
Guide bar
Clean and turn over Deburr
X X
Replace
X
X
Chain sprocket
Check
X
Air filter
Clean Replace
X
X
X
Antivibration elements
Check
X
Have replaced by dealer1)
X X
MS 311, MS 391
47
English
before starting work...
Product Instruction Manual - Page 50
... wood, etc.), shorten the specified intervals accordingly. chain must not rotate
X
X
Readjust idle
Spark Plug
Readjust electrode gap Replace after every 100 operating hours
All accessible screws and nuts (not adjusting screws) 3)
Retighten
Sparl arresting screen4) in muffler
Check Clean or replace
Combustion chamber
Decoke after first 139 hours of operating, then every 150 hours...
Product Instruction Manual - Page 52
..., run and stop switch position.
21 Throttle Trigger ...carburetor.
3 Spark Plug Boot Connects the spark plug with Spark Arresting Screen, ...ignition lead.
4 Shutter (Summer and Winter Operation) With summer and winter positions. Is activated in winter position.
5 Decompression Valve (Automatically Resetting) Releases compression pressure to the operator's hands. (not illustrated)
50
MS 311, MS...
Product Instruction Manual - Page 57
...replacement of a warranted part still under warranty. Trademarks
English
STIHL Registered Trademarks
STIHL® { K The color combination orange-grey (U.S. Control Linkages - Spark Plug...the recommended 2-stroke fuel-oil
MS 311, MS 391
55 Limitations
This Emission ...related warranted parts: - Magneto or Electronic Ignition
System (Ignition Module) - Fuel Line -
Fuel Cap...
User Manual - Page 2
...
MS 311, MS 391
q
© ANDREAS STIHL AG & Co. KG, 2009
1
Chain Lubrication 65
44
44 11.1 Pickup Body
65
11.2 Oil Suction Hose
65
44 11.3 Oil Pump
66
46 11.4 Valve
67
46
48
5.1 Checking Operation 20 8.
Clutch
4.1 Clutch Drum
5.
Chain Brake
8 7.1 Ignition Timing
7.2 Preseparator
7.3 Ignition Module
9 7.4 Testing the
10
Ignition Module
11 7.5 Spark Plug...
User Manual - Page 13
...for damage and replace crankshaft if necessary
Weak magnetization in ignition lead or short circuit wire. Engine housing damaged (cracks) Install new engine housing
12
MS 311, MS 391 If sooting keeps recurring, check air filter
Ignition lead loose in ignition module
Secure ignition lead properly
Fuel/oil mixture - Condition
Engine runs roughly, misfires, temporary loss of spark plug.
User Manual - Page 39
... groove (arrows).
: Check correct installed position of the piston rings (arrows).
- Remove the piston, b 6.7
- Install the cylinder, b 6.5
: Install the new piston rings in the grooves so that the radii at the ring gap meet at the fixing pin in the reverse sequence.
38
MS 311, MS 391 Inspect the piston rings and replace if necessary, b 6.8
- Remove...
User Manual - Page 43
... the spark plug boot.
42
MS 311, MS 391
Keep fingers or other parts of the spark plug boot.
- Crank the engine quickly with STIHL press fluid, b 14
: Hold the ignition lead and leg spring together and push them into the pierced hole in the center of the spark plug boot with the rewind starter and check spark in the window (3), check the ignition...
User Manual - Page 50
...Severe chafing?
- Check continuity, replace wiring harness if necessary, b 7.7.2
Check the ignition lead: - Check resistance of ignition lead (spark plug
boot and ignition module removed) Spec.: < 10 Ω,
If necessary, install new spark plug boot and/or ignition lead with module, b 7.3
2
MS 311, MS 391
3
49 1
Powerful
yes
spark? Connectors firmly seated?
- Resistance: spark plug boot to...
User Manual - Page 51
...Check engine for fault in fuel system or carburetor
- 2
3
Check operation
of flywheel on
crankshaft, b 7.6, b 6.5
MS 311, MS 391 Short circuit wire chafed?
- Function between contact spring and switch
shaft contact: - no
Install new ignition b 7.3
yes
Engine
runs?
Look for leaks -
Position "0" = connection
- Install new short circuit wire if necessary, b 7.7.2
Powerful
yes
spark...
User Manual - Page 76
... still held in
- MS 311, MS 391
75 Installing
2
1
1
2
1
0001RA372 TG
4903RA262 TG
0001RA370 TG
: Carefully separate the pump diaphragm (2) and gasket (1). i.e. Check the pump diaphragm for contamination and damage. Check fuel strainer for signs of the adjusting screws.
: Fit the end cover (1) from the carburetor body.
Reassemble in position.
2
1
0001RA371 TG
0001RA373...
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