Chain Saw 20″ Bar

Need air gap on husqvarna 394xp chain saw

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SPARK PLUG GAP: 0.50 mm (0.020 in.)
Setting Gauge 0.35mm for Setting Ignition Coil Gap. Genuine Stihl Part.
The gap setting is different for each vehicle but most are somewhere between 0.028″ and . 060″. Consult the owner`s manual or Champion ® catalog to find the recommended setting for the vehicle you`re working on.
For most racing applications, you usually want the plug gap to be between 0.020 and 0.040 of an inch. Most engine builders seem to settle around 0.035 of an inch. Factors such as the type of ignition you run, cylinder heads, fuel and even timing can affect how much gap will work best for you.
As long as it is not less than 0.30mm, it will be OK. If the gap is too great, the engine may not start as easily. If the gap is too small (< 0.30mm), there is the risk that the coil and flywheel might touch as the flywheel heats up and expands when the engine is run.
If the gap is too small, the spark will likely be too weak and cause the engine to run poorly or with poor efficiency.
For circular coils this spacing is equal to half the diameter of the coils; for square coils it is2 equal to 0.5445 times the length of a side.
The larger the gap, the more voltage is needed to jump the gap. Most experienced tuners know that increasing the gap size increases the spark area exposed to the air-fuel mixture, which maximizes burn efficiency.
Q: What Happens If You Don`t Gap Spark Plugs? A: Ungapped spark plugs will cause misfires as the gap between the electrodes could be too small or too wide. The air/fuel mixture then may not ignite or ignite on the wrong stroke, which can cause misfires.
SPARK PLUG GAP: 0.5mm (0.020 in.)
A) For 28-32 cc engines, set the gap at 0.020″ (0.5 mm). B) For 38-55 cc engines, set the gap at 0.025″ (0.635 mm). IMPORTANT!: Always refer to the appropriate product Operator`s Manual for exact specifications and additional model specific service information when replacing spark plugs.
With a spark plug gap of . 6mm (~. 024″), this spark plug is designed specifically for 49cc 4-cylinder bicycle engines. Without a spark the fuel in your motor won`t create the explosion needed to move its piston up and down in order for the engine to run properly.

Discover Relevant Questions and Answers for Your Specific Issue

the most relevant questions and answers related to your specific issue

What is the coil gap setting for a 1998 Husqvarna 141
ANSWER : The coil gap shpuld be 0.3mm

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New coil for chainsaw
ANSWER : The coil is on the flywheel side of unit. remove the recoil cover and you will see the flywheel and coil. your have to remove the ground wire from shut off switch and two bolts holding coil in place. when installing new coil you need to leave a 10 thousand air gap between the coil leg and the flywheel magnet for proper operation

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Replacing coil pack need to know space from mag
ANSWER : Ignition module gap Place a business or index card between the fly wheel and coil, rotate until the magnetic attraction pulls everything tight together. Tighten the coil screws, rotate the flywheel until the attraction eases and remove the card. Ensure nothing contacts when flywheel is rotated.

If you have more questions or need additional help please reply below and I will get back to you. Good Luck. HTH
Lou
Thank You for using FixYa.

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What is gap between coil and flywheel – Husqvarna Hand Held Blower 125 B Grass Leaf Blower ()
ANSWER : Use a good quality business card

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How to tell if the coil is bad on a 345 Husqvarna chainsaw
ANSWER : Best way is to see if the plug has a spark, by removing it, hook the wire up, and ground the plug on the cylinder,and pull the rope, look for a good blue spark.also replace the spark plug if you can

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Wire for my stop switch came unplugged .Where does it plug into?
ANSWER : The plastic switch pivots to allow your wire to make contact with a metal tab. As you move that lever back and forth, you will see where it comes close or touches that metal tab. When you inspect that spot, you will see where the wire plugs into the plastic lever.

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How to replace ignition coil on asthil 029
ANSWER : Coil should be held on the saw with 2 torx t27 size screws. These will resemble a star. Remove the 2 screws, lift out the coil. The small wire should be attached with a spade connector, slide the spade off with needle nose pliers. Disconnect the spark plug wire from the spark plug, & thread it out of the saw as you remove the coil. Assembly is reverse order of removal. For clearance, loosen coil screws, alike coil away from flywheel

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What is the clearance setting between the ignition coil and the flywheel on a model 61 chainsaw?
ANSWER : I set all my flywheel clearances to the thickness of a #100 sheet of sand paper. It has to be just able to slide back and forth to clean off the rust on the flywheel. Pull out the sandpaper blow out the dust and it works for me.

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