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Porter cable 5250 backfiring and won't start

I change the oil, the spark plug, the start to switch, and carburetor! Indy backfired putter and won't start. I bought it used wasn't turning so I used some JB blaster to the spark plug hole to get free.

Posted by George on


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  • 14 Answers

SOURCE: my car backfires and will not start.

check the fireing order of your plug wires u most likeley crossed a few wires and put them in the wrong order if u r looking at the front of the vehicle the front 3 cylenders are 2,4,6 starting from the front of the moter and the back 3 cylenders are 1,3,5 and the coil packs should be marked as to wich cylendr they go to if not the startin with the top coil pack the top plug wire pin is num1 and the second is num4 the next coil pack is 5 being the top pin and 2 being the bottem pin on the coil and the last coil pack is top pin cylender 3 and bottem is cylender 6. hope this helps

Posted on Aug 04, 2009



  • 3740 Answers

SOURCE: backfiring

Check the chassis wiring whe it enters the side cover on the ignition side of the engine. There is supposed to be a rubber grommet there. Soetimes that grommet gets kicked loose where is comes out of the side cover hole and the wires chafe to the point that they ground out the ignition module.

Also looks for bare wires under the gas tank around the ignition coil module. Everything your describing points to a chassis short to ground.

Also the problem can be in the handle grip with the kill switch or a bad kill switch.

It is probably time to break out the Ohm meter and start chasing wires.


Posted on May 04, 2010


Neil McRobbie

  • 191 Answers

SOURCE: 2007 yamaha yz450f... while riding

Exhaust leaks near the exhaust port can draw air into pipe on deceleration and detonate any unburnt fuel leaving engine, causing backfire and high temps.
An overly lean fuel mixture on the engine can make decel backfire worse too.

Posted on Mar 13, 2011

mike butler

  • 6468 Answers

SOURCE: My Sears Riding Mower Runs Rough & Backfires

don't know the model but check the valve adjustment

Posted on Apr 08, 2012


George Agios

  • 220 Answers

SOURCE: 96 chevy silverado changed plugs and wires now it backfires why

you cross two of high tension lead for the spark plugs.

Posted on Sep 12, 2012

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Backfiring won't start bought new coils still won't start and pops backfires

Do you have a carburetor? If you do, it is set too rich. Also, your timing appears off. If you do have a carburetor, adjust the setting to the left a couple of turns. This will lean out the gas mixture. If you have a fuel injector, have the system checked. The air filter could be clogged and the fuel injector could be misaligned.

A backfire is often created because the timing is off, forcing the spark plugs to fire before the pistons get to the top of its power stroke, causing the mixture to burn prematurely.

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93 Honda CBR 600 F2 Won't start just backfires

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What type of oil do i take for a porter cable 5250 watt electric generator?

Your generators take ordinary 10W30 motor oil.
We use these things on the job.
Don't turn engine upside down or on its side to drain oil, or oil will run into carburetor

Oct 24, 2010 | Porter Cable PorterCable BSI525W 5250 Watt...

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