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ENgine runs very rough, replaced spark plug, no change in condition. What's the gap for the magneto?

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6ya6ya
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SOURCE: I have freestanding Series 8 dishwasher. Lately during the filling cycle water hammer is occurring. How can this be resolved

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Posted on Jan 02, 2017

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SOURCE: Vibration after spark plug/wire change

Check your firing order

Posted on Aug 17, 2008

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SOURCE: Briggs & Stratton engine on Murray lawn mower

I always replace the air filter if its a paper element, and even if its a foam element I replace it rather than clean it. That said, engine stumbling is rarely and air flow problem - but it could be, so having a new filter assures no air restrictions.

I would drop the carbuerator bowl. On the bottom of the carb, near where the fuel line comes into the engine, should be a nut. Removing this nut allows the bowl to drop off the carb. Some engines the bowl screws off, you will have to look at the bowl. Often the bowl has sediment or sludge buildup inside. Cleaning the bottom of the bowl can prevent that sludge/sediment from plugging the intake tube. Even on newer mower models this is a common problem, the gas line tubing interior breaks down and the inside of the tubing can start degrading - ending up in the bowl as sludge.

After cleaning the bowl, I would add one ounce of fuel line cleaner to a full tank of fuel and run the entire tank of fuel. This will clean any deposits or "varnish" from the interior carb parts. Doing this and the first step will assure your carb is clean and functioning.

If that doesn't help, then I would look at the spacing between the magneto and coil assembly. If you want to do that I'd like you to write down all the model numbers and serial numbers on the engine nameplate, that way I can give you specific directions.

Hope this helps,
Gregg

Posted on Mar 29, 2009

  • 475 Answers

SOURCE: starts runs min. or two then stops....

Go to toro.com then click customer care, then click manuals and parts. Type in model no. and download the owners manual. This should get you the spark and flywheel gap. Probably still something in the carb. Some orifices are very hard to find and to clean but they must be clean. Also check for dirt dopper nest in the muffler.

Posted on Apr 06, 2009

moretons
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SOURCE: Homelite Mighty Lite Lawn Trimmer Magneto Air Gap setting 25cc

Normall setting is 10 thou but if there is no play in the crank bearings you can set at 8 thou

Posted on Jul 26, 2009

  • 25 Answers

SOURCE: I own a 2002 Chevy Trailblazer with 4200 vortec

Do you know if the plugs were changed, a bad or broken plug will also cause rough idle and slow acceleration?

Posted on Oct 21, 2009

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2 Answers

What should the spark plug gap for magneto be on an autolite 216


I see anywhere from .030" (.76mm) - .035".. the smaller gap will be easier for the magneto to fire...and probably run better at low speeds..

Sep 23, 2017 | Garden

1 Answer

Need gap specifications


The gap between the flywheel and magneto (pick-up coil) is not that critical, if your engine is not running right or won't start. 2 to 3 mm is fine. The key point is that the gap be uniform in the arc where the fly wheel passes it. Please post your symptoms and we can better assist you on the forum. If you are not getting any spark from the plug wire... check this at night by unplugging the plug boot and pulling the cord and watching; if you can't detect a spark... then you have a magneto issue or a bad spark plug wire. A little crokus cloth to rub the rust off the entire flywheel edge surface will help. Don't sand down or apply solvents to the magneto surface even if it's rusty!

Oct 12, 2014 | Garden

1 Answer

2001 Chevy venture intermittently running rough.


Check air filter. Check for any vacuum leaks. Check condition of plug wires. Were new plugs pre-gapped? If not, make sure the spark gap is correct for your vehicle.

Sep 24, 2012 | 2000 Chevrolet Venture

1 Answer

What would cause no spark? the mower is a masport 8/02 two stroke. Will not start and I have changed spark plug and cleaned every thing but still nothing.


Your spark plug wire may be damaged, or your magneto may be too weak to generate a spark. You also have a kill switch wired to your magneto, and a condensor. I would start by cleaning the contacts of the magneto and then check the gap between the magneto and the flywheel. The gap between the flywheel and magneto should be .010". I would start by checking the kill switch wire for damage. If any damage is suspected, replace the kill switch. Next, I would have the magneto tested or replaced. Also, check all your ground wires for damage, or loose contacts.

When you are checking for a spark, you should have the spark plug installed in the spark plug wire as normal, but not installed in the engine. The spark plug base should be grounded to the engine while trying to start and checking for a spark. If there is a weak spark, this is probably due to a worn magneto.

May 24, 2011 | Briggs & Stratton Garden

1 Answer

Wont start spark plug is wet . has good compresion


Possibly magneto problem.
Remove sparkplug and whilst wearing a thick rubber glove hold side of plug against engine head. Pull start cord and watch to see if there is any spark. If not replace spark plug first. If that doesn't solve it replace magneto. If there is a spark then the plug may need cleaning and the gap may need adjusting, fuel mixture may be too rich

Feb 18, 2011 | Garden

3 Answers

I have a Briggs & Stratton 18.5 HP Twin Cylinder engine that has no spark. How can I check the magneto? And, there is a wire that goes to the magneto. Should there be 12v to that wire? If I replace the...


It all depends on the model of engine. If it is a twin engine doesn't it have two magnetos.Very unusual for both to go bad It will depend on the type of ignition(points or solid state) The wire going to the magneto could be the kill switch (kills when grounded) Disconnect it and see if you get spark. IF so then it is in your safety/ignition circuit. If you replace magneto usually the gap is .008-.012

Aug 18, 2010 | Garden

1 Answer

No spark on Mc Culloch 110 saw


Remove the stop switch wire from the switch and check for spark (use a clean spare plug and the plug base touching engine metal), If nothing, trace the wire back to the ignition coil looking for worn insulation. Is this a magneto model or an all-in-one module? If a magneto, there should be points and condenser--check points gap (about 0.015") and condition. Check the core gap to flywheel magnets (I use card stock to set the gap). Try to wiggle the flywheel to check for crankshaft bearing looseness. If the ignition is an all-in-one module, check the core gap to the flywheel magnets. Otherwise replace the module. Hope this gets you running.

Aug 26, 2009 | McCulloch Garden

2 Answers

How to replace sparl plugs on a Jeep Cherokee?


Hello, I hope this info helps...(subytech1)...REMOVAL
In this engine, each individual spark plug is located under each ignition coil.

  1. Prior to removing spark plug, spray compressed air around base ofignition coil at cylinder head. This will help prevent foreign materialfrom entering combustion chamber.
  2. On this engine each individual ignition coil must be removedto gain access to each spark plug. Refer to Ignition CoilRemoval/Installation.
  3. Check condition of coil O-ring and replace as necessary.
  1. Inspect spark plug condition. Refer to Spark Plug Conditions.
CLEANING
Theplugs may be cleaned using commercially available spark plug cleaningequipment. After cleaning, file center electrode flat with a smallpoint file or jewelers file before adjusting gap.

CAUTION: Never use a motorized wire wheel brush to clean sparkplugs. Metallic deposits will remain on spark plug insulator and willcause plug misfire.

ADJUSTMENT

Setting Spark Plug Gap - Typical
Check spark plug gap with a gap gauge tool. If the gap is not correct,adjust it by bending ground electrode. Never attempt to adjust gap bybending center electrode.

INSTALLATION

CAUTION: This engine is equipped with copper core groundelectrode spark plugs. They must be replaced with the same type/numberspark plug as the original. If another spark plug is substituted,pre-ignition will result.

Special care should be taken when installing spark plugs into cylinderhead spark plug wells. Be sure plugs do not drop into plug wells asground straps may be bent resulting in a change in plug gap, orelectrodes can be damaged.

Always tighten spark plugs to specified torque. Over tightening cancause distortion resulting in a change in spark plug gap or a crackedporcelain insulator.

  1. Start spark plug into cylinder head by hand to avoid cross threading.
  2. Tighten spark plugs to 27 Nm (20 ft. lbs.) torque.
  3. Before installing coil(s), check condition of coil O-ring andreplace as necessary. To aid in coil installation, apply silicone tocoil O-ring.
  4. Install ignition coil(s). Refer to Ignition Coil Removal/Installation.

Aug 07, 2009 | 2000 Jeep Grand Cherokee

4 Answers

Poulan Pro 200 Leaf Blower won't start. I have installed a carb kit with no results. The spark plug was wet before the new kit---it continues to be wet. I have tried a replacement spark plug with no...


Alright, remember that 2-Stroke motors are meant to do 2 things:
Break down, then Frustrate you.

So, here we go: (Electrical)

Rotor Magnets, Magneto (ignition coil), Spark Plug Wire, Spark Plug, Spark Plug Ground (Cylinder Head).

In that order!

Check your "fire" from the Magneto:

1. Check your Kill Switch. In other words, leave everything normal, and unhook it. Did she start? Kill Switch it is! Kill Switch/Wire comes from the Magneto (single wire/ground) to the Switch itself. So check that wire AT the Magneto (Is it loose and grounding out? Is the Kill Switch grounding you out where it is, because of crud, junk, or because it is touching the block when it is not supposed to?)

2. Check your Spark Plug Wire. Easy, unook it from the plug, stick your finger in, give it a crank (non-MultiMeter way). Did you get shocked? Then it ain't your Plug Wire and Magneto!

With a Multi-/Volt Meter, simply hook her up, and check for juice WHEN you pull the rope. If you got juice, it ain't your Plug Wire or Magneto!

Checking Spark the "normal" way: Grab the Plug with a pair of insulated pliers, hold the plug end against the cylinder head, and pull your rope. Any Spark? What color?

3. STILL no fire. It leaves: Magneto and Plug Wire.
Luckily, they are both in the same place! Tear your blower down, and check to see if the Magneto has slipped out of place (gap is WAY out), or if the Plug Wire has worn to the point it is grounding you out. While you are there, check your Kill Switch wire, to see if she is grounding you out then and there.

4. STILL no fire. That means: Magneto Failing, or Magneto JUNK.
Buy another one, replace it! (Or steal one from another junk Blower/Weedeater. These things are fairly standard, and easy!)
Or, Bad Plug Wire. Meaning she has failed out on you.
Wait......that means: Replace your Magneto! Lucky the things are built together right?

Apr 22, 2009 | Poulan/Weed Eater No. Bvm200le 711482 24cc...

1 Answer

Craftsman 21'' Lawn mower won't start


In order for there to be a spark at the plug, make sure the plug is grounded to the engine, it will not "fire" if it isn't.

Remove the cover with the crankrope, there should be a thin black wire going to the coil, going to a ground lug that kills the engine. Try unplugging this wire and re-check the fire...if it fires, there is a fault in this wire and should be replaced. The mower will run without it, but will not stop without "choking" out the engine

Apr 15, 2009 | Craftsman Garden

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