Question about Garden

2 Answers

I have a problem with my master craft lawn mower 2000 model. 4 stroke. 4.0 hp. There is no spark or current produced from magneto. What should I look for? I replaced the soft key on magneto and crankshaft.

Posted by on


2 Answers

  • Level 2:

    An expert who has achieved level 2 by getting 100 points


    An expert that got 5 achievements.


    An expert that has over 500 points.


    An expert who has answered 200 questions.

  • Expert
  • 246 Answers

I would remove the flywheel to gain access to your points and condensor. You might need to use a wheel puller to remove the flywheel. Once removed you will see another cover that houses your points and condensor. I would definately replace these no matter what. Be sure to set your new points to their proper gap...usually about .015 thousands. When setting gap make sure you are on one of the high sides of the cam. After installing turn crank shaft with cresent wrench adjusted around crank shaft and resting against the soft check to see that points are opening and closing properly. (Turn crank clock wise) Re-assemble all and give er a go!

Posted on Jul 28, 2009

  • Level 2:

    An expert who has achieved level 2 by getting 100 points


    An expert that got 5 achievements.


    An expert who has written 50 answers of more than 400 characters.


    An expert whose answer got voted for 20 times.

  • Expert
  • 135 Answers

Good that you thought to replace the flywheel key, because the slightest partial shearing can throw the timing off enough to cause run issues.

Make sure you don't have spark by removing the spark plug from the cylinder and laying it on the engine while someone cranks it hard. If you still don't get spark try it with a new plug.

Next check that the kill switch (usually operated by a cable to the dead man bar on the handle) is opening up when the bar is grasped. The cables can become frozen and rust solid from moisture in the cable. Replace if the cable doesn't move smoothly inside the sheath.

Next would be the ignition module if separate from the ignition coil or the whole coil if they are a single unit. If you have to adjust the gap on the magneto, a plain 3x5 card can be used between the flywheel and coil if you removed the coil.

If the pad on the flywheel brake is worn down to metal, make sure the flywheel shavings aren't accumulated around the magneto laminations. And, replace the flywheel brake if worn down.

If the spark turns out to be good, you could have a clogged main jet or the primer mechanism isn't working properly.

Hope this helps.

Posted on Jul 28, 2009


1 Suggested Answer

  • 2 Answers

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

a 6ya expert can help you resolve that issue over the phone in a minute or two.
Best thing about this new service is that you are never placed on hold and get to talk to real repairmen in the US.
New users get to try the service completely Free afterwhich it costs $6 per call and covers almost anything you can think of (from cars to computers, handyman, and even drones).
click here to download the app (for users in the US for now) and get all the help you need.

Posted on Jan 02, 2017

Add Your Answer

Uploading: 0%


Complete. Click "Add" to insert your video. Add



Related Questions:

1 Answer

What supplies voltage to spark plugs?

The spark on the 25 hp Kohler is Magneto. There is likely an interlock to the PTO and Seat safety interlock. The magneto appears in some lawn garden applications to be connected via the safety interlock?

So when the engine turns the magnetic field of the flywheel activated the engine spark but if the interlock safety switches are not enabled the spark the magneto is disabled resulting in no spark. A lost spark is likely a defective or corroded switch.

I hope this helps?

Jan 11, 2016 | Cub Cadet Riding Lawn Garden Tractor 25hp...

1 Answer

Late 90's Master Craft Tecumseh Prism 4 lawn mower engine... how do I identify the model number

I suggest take photos of it from all sides then show the photos to the mower parts counter guy.
Then buy the shop manual from him. They last forever.

Aug 24, 2015 | Tecumseh Garden

1 Answer

Why Spark on Briggs and straiten motor?

Does it have a shutoff wire on the carburetor?

Use a meter to check the coil at the magneto - if that coil reads "open" (no continuity), then it's bad & needs replacement.

Jul 26, 2014 | Garden

1 Answer

No spark

if you still have a lawn mower with a condensor, throw it away please. if you have no spark suspect the ignition coil or kill system

Dec 27, 2013 | Garden

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

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

4 cycle, 5hp briggs and stratton, lawn mower engine fails to start, no spark at the plug model 130202, N type magneto (i believe)

Try taking off the engine shroud and cleaning the magnets on the fly wheel. Also clean the two little prongs on the magneto. Also clean the end of the spark plug wire. I use fine sand paper or emery cloth.

Good luck and let me know if this helps.
thanks roundo4

Sep 06, 2009 | Garden

1 Answer

No spark I put new spark plug and gaped new

check the small wire coming out the magneto maybe it is grounding out somewhere, disconnect it from trhe magneto and then see if you have spark

May 16, 2009 | Cub Cadet Street Sign- tractor lawn riding...

Not finding what you are looking for?
Garden Logo

Related Topics:

107 people viewed this question

Ask a Question

Usually answered in minutes!

Top Garden Experts

Dennis Key
Dennis Key

Level 3 Expert

2478 Answers


Level 3 Expert

540 Answers

john h

Level 3 Expert

12650 Answers

Are you a Garden Expert? Answer questions, earn points and help others

Answer questions

Manuals & User Guides