Question about kawasaki Fh641v 21hp 21 Hp Riding Lawn Mower Engine ()

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No spark I went to start the mower and it almost started ,but after several attempts-nothing. I found it has no spark.Is there a kill switch wire and where is it located?

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DO NOT DISABLE SAFETY SWITCHES, which riding mower company i will try to get the answer for ya

Posted on Apr 13, 2014

Testimonial: "I had took out a 20hp ONAN ENGINE and the Kawasaki is replacement about 3 years ago. I never had a problem before. It always started right up. Like I said it tried to start but nothing. I put in a new spark plug-no thing -no spark""

  • Chris Lawrence Apr 14, 2014

    first thing to do is go to a automotive parts store and ask for a "INLINE" spark tester it will be the best diagnostic tool you own.



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Troubleshouting 10 hp mower briggs &stratton wiring to spark plug

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I have a snapper 28 hi vac riding mower that won't

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Apr 23, 2012 | Briggs & Stratton 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

1 Answer

We can't get a spark

The safety features on the riding lawnmowers can be hard to troubleshoot.
1.The starter should NOT operate when blades are engaged.
2.Spark will not occur without a rider ON the seat with the blades engaged,
3.Spark will function with the parking brake on (on some models)
Theirs two wires coming out from under the engine top cover,(for a Briggs)
One is for charging and the other is the kill switch.
If you remove the kill switch wire then attempt to start and the magneto is good
you will have spark.
DO NOT use mower without the safety functions connected.
If you have spark with the kill wire removed then the wiring and /or switches are faulty
Make sure the plug is against the ground or it will not spark.
We can go from here.
Good Luck

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Eager ****** gas line trimmer will not start no spark at plug

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Craftsman lt1750 with kohler cv491 engine. I have a new battery,checked the seat switch,made sure the brake was on and pto not engaged but I get nothing. Any ideas?

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1 Answer

Lawn mower will not start. I changed spark plug, gas is in the mower and oil, mower still does not run

If your mower will start when you prime it, and then it dies right away, you have a carberator pluged. If after primeing the mower and it will not even start for a few seconds, you have lost spark. If you have no spark, this can be cause by two things. First, the magnito could have gone back, but this dosen't happen to often, but it can happen. First, check to see that the cable from the brake handle has not stretched. This controls engine brake and its also the kill switch, which kills the spark. Get acess to your engine brake, and you will find a wire connected to a tab. Remove this wire and try to start the mower. If it starts, replace the control cable. If it dosen't start, hook the wire back up and replace the magnito. I hope this is of some help

May 05, 2010 | Garden

1 Answer

Riding mower wont start

Hi Pry

The spark comes from the Magneto. Follow the spark plug wire and you will find the magneto at the end of it

The first thing you should check though, is the safety kill switch. There is a pressure switch in the seat that kills the engine in the event the driver falls off.

You need to be sitting on the mower to start it.

If the switch is ok and you still get no fire, it's the magneto.

Best regards,

Sep 07, 2009 | Garden

1 Answer

NO power to spark plug

more then likely it is the kill switch wire off your coil

Nov 15, 2008 | Husqvarna Garden

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