no spark on a 6hp briggs and stratton ?

[Kwjeep]

I have been working on my pressure washer the last few days. No start. Pulled the plug out and held it to the engine had wife pull start it, no spark. New spark plug still no spark. New coil no spark. Could the new coil be bad? I bought a briggs and stratton coil (not a cheap OEM) off of Amazon. Matched the numbers from the manual on the briggs and straton web site.

I have watched several youtube videos about checking for spark and tried with the wire ground wire connected and not connected. Is there a way to check the coil with a meter?

 

[Throbbin Rods]

Double check the throttle assembly to make sure that the kill wire isn't permanently grounded?

Pull the flywheel and make sure that there isn't rust etc on the magnets?

 

[The Cobbler]

is the flywheel free of rust on edges? did you set the proper air gap on the coil?

 

[Kwjeep]

Yes there is rust on the fly wheel, I will sand that off tonight after work. The gap was set with the card that came with the new coil. I also found this site that looks helpful for any others that are having issues

http://forums2.gardenweb.com/discussions/1501122/no-spark-from-65-hp-bands-engine

The pressure washer has been barried in the shed for a few years. It did work when it was put there.

Thanks for your help

 

[dogdog]

Did you check / set that magneto gap properly? (that coil gap by the flywheel with the strong magnet) If you don't have a feeler gauge use a standard business card thickness, most are about that thickness ?

Also use your tongue(just kidding) or get that neon spark tester much easier on your self for $6 or so, from autozone of HF.... one of their non sucky tools that actually works.... I have used it for few small engines works great. I have never able to tune with that plug held to body.... can't beat $5. just eat 1 less sandwich.

as far as the coil, if it is grounded it stops the engine, no spark will be generated. so make sure the switch does not ground the coil, if you want it to run.


http://www.harborfreight.com/90-inline-ignition-spark-checker-69023.html



As far as rust at the edge of the fly wheel, don't think it matter much unless it is heavy rust. there is one portion of the flywheel where there are two magnets are. when you set the gap , the magnet have to be at the coil and that portion of the flywheel is not damaged, weak covered with dust etc...... at least that is how it is on my craftman pressure washer and snow blower that is also Brigg and stratton engines.

Spark is generated when those magnets charge up the magnet fields and breaks the magnet fields in the coil windings. If it is grounded, the charges would just flow to ground,.....

Just googlefoo "magneto" ....or have one of the current air craft guys explain that to you....

 

[The Cobbler]

good points on the kill wire. reminds me of a rototiller I bough cheap. wouldn't start, the guy was tired of fooling with it. I brought it home, the kill wire was worn & shorting to ground. fixed that and started right up...

 

[skidozer670]

does it have a low oil level sensor?

 

[kelpaso1]

If it is an older B&S engine it may have points and condenser. Look at where the wire going to the coil goes. If it goes in behind the pull starter then it most likely has points and are accessed by removing the pull start assembly.

 

[G_P]

does it have a low oil level sensor?

This. If it has a low oil cutoff, the oil could be too low or the switch has failed. Check the oil level and if it's good, bypass the switch.

 

[dogdog]

Think it is just easier if OP just post the make and model of the B&S engine.

Not sure if a pressure washer have lower oil sensors unless it is some fancier model.
Coils usually don't go bad unless you leave it in an environment that really rust them out


as far as to measure the coil, it's just a good ohm meter that can measure less than 1 ohm accurately and take a measurement against the manufacture's reference in the manual some where. Each manufacture's coil will have a different range.

 

[Streetbu]

Pull the only wire that plugs into the coil. that grounds it and kills the spark. If you have spark after that then it like others have said, low oil sensor, low oil, safety switch, etc that is killing your spark.