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Matt Krajniak Posted on Jun 10, 2019
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I have a pressure washer with a Briggs & Stratton Engine that won't start. The terminal on the coil that leads to the kill switch is grounded--even when disconnected from the kill switch. Is that bad?

I have a pressure washer with a Briggs & Stratton Engine that won't start. I first thought the carburetor was gummed up (it's been sitting), but when I removed the kill switch I tested it with a volt meter. The switch works, but the wire to the coil is grounded at all times. I pulled the wire leading to the kill switch off of the coil (to eliminate the wire itself as a problem) and found the terminal on the coil is also grounded. Does this mean I have a bad coil? My theory is that it's grounded where it shouldn't be, and therefore is generating a weak (or no) spark.

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Vernon Taylor

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  • Briggs & Str... Master 7,446 Answers
  • Posted on Jun 10, 2019
 Vernon Taylor
Briggs & Str... Master
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If it is an older engine with standard flywheel ignition (contact breaker inside the flywheel) the coil will be grounded except when the contacts are open and even then a casual test with the average multimeter it will appear to be grounded as the coil resistance is very low; just a few ohms needing the low range of a digital multimeter to measure...

When those engines have been unused for a while it is almost certain the contact breaker and perhaps the condenser will need attention.

If it is a later engine fitted with an electronic ignition module, once the kill switch has been disconnected and the spark is still absent, it is almost certain to need a replacement module unless the flywheel has lost most of its magnetism.

5 Related Answers

Anonymous

  • 372 Answers
  • Posted on Aug 06, 2008

SOURCE: 94 Jeep Cherokee won't start

I believe the green wire is a pulse from the distributor and its a ground signal. I could be wrong since is been a while since i left the jeep dealer...I would take the coil out (2 bolts on most) and take it to autozone. They can test it in minutes for free. Either that or the ignition module but more common is coil.

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Anonymous

  • 16 Answers
  • Posted on Jan 17, 2009

SOURCE: Stihl MS 290 won't start

Probably needs a carb rebuild kit. a lawn mower shop can do it if you cant.

Anonymous

  • 1 Answer
  • Posted on May 13, 2009

SOURCE: Rear cylinder not firing

95 Evo, new plugs, new wires, started backfireing like a machine gun, front cyl. no spark at plug sometimes - would this be the coil, have not ohmed the coil yet . Thanks

Anonymous

  • 57 Answers
  • Posted on Jul 31, 2009

SOURCE: Generator with Briggs & Stratton,no gas is getting in carburetor

The needle valve may be stuck which would not let gas into the carb. I don;t think rebuild kits are too expensive. Pull the carb and take it to a lawnmower repair shop and they should have the parts. Before that though pull the bowl and make sure it has gas in it. If no then remove the fuel line and make sure gas flows from it. If no then could be the fuel shutoff valve is not operating properly or junk in the gas tank is obstructing the line.

Anonymous

  • 18 Answers
  • Posted on Sep 20, 2010

SOURCE: 11 hp honda pressure washer

if you replaced the coil,check the wire and boot,check with meter for continuity.could be loose connection to spark plug

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1answer

Engine wont fire....

There should be 1 black wire that grounds the coil(s) for kill. Be sure this black wire is not grounded when switch is in on or start position. It will be connected to the coil(s) at the flywheel.
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The kill switch will not shut down the motor

You have a broken wire to the coil or bad connections where it is not making ground when the switch is in the off "kill" position..it normally is the small black wire running from the off position on the switch to the front to the coil.check the connections one at a time.if ok then try to stop engine . Now disconnect one at a time the and test the coil end then the switch end or visa versa. using anything to jump or temporarily connect it to the coil or the switch just remember one end at a time...if nothing then disconnect both ends and check for continuity If none replace the wire if find the break and cut and splice.....good luck
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Troubleshouting 10 hp mower briggs &stratton wiring to spark plug

the small wire that goes to the coil is the kill switch wire grounding terminal kills the engine if you remove that wire and you get spark the problem is the wiring if still no spark replace the coil
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Engine wont shut off

the wires going to the coils are shutoff wires you can run both to a switch and then a wire from the switch goes to ground when you flip switch it grounds the coils shutting off the motor
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Your kill wire from the switch to the coil is bad,disconnected or connections dirty...or switch is bad...try disconnecting the kill wire on the coil and using a jumper ground the coil directly to the engine or frame it should shut down if it does it is the wire or switch do the same at the switch if it shuts down it is the switch..if not the wire has a break..good luck..
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How to fix an off and on switch on a briggs and straton model series, 19e400 5000 watt, on and off switch located on top of the motor. is there a wire thats supposed to hook onto the switch somehow.

Kill switch should have a wire connected to the tab on the spark coil under fan cover. The switch is a means of shorting kill wire to ground. On some generators, there will be another method of shutting down the engine. Usually on/off switch will be more visable on the control panel. Most likely the switch on fan cover was not connected to prevent confusion.
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remove blower shroud off top of engine.Remove grass screen first.disconnect ignition kill wire from coils,retest for spark,if no spark check kill wire,wire that was disconnected from coils for short to ground.If wire checks ok,replace coils.Forty years in small engine repair.
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I have a twin cyl.briggs but has no spark

i pressume you have replaced both plugs?

can you remove the blower cover from the engine and pull the wires that connect to each of the coils ( these are the kill wire leads) make sure leads wont get caught in flywheel and try starting engine

if now starts could be shorted diodes in harness or earth wire making contact when it shouldnt

if it does not start possible coils have been damaged by d/c current from faulty igntion switch or incorrect wiring



if diodes shorted they will need replacing and have the ignition switch checked
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