Question about Briggs & Stratton Lawn-Boy Insight Series 21-Inch 190cc 650 Series Gas Powered Engine Variable Speed Self-Propelled Lawn Mower

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Mtd yardman wont start getting feul no spark detected

Ive cleaned the filter, spark plug is clean and has the proper gap, there is feul getting to the carburetta, also the feul filter is clean but doesnt want to start, maybe the magneto what do you think, thankyou for your help

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If you have no spark check the contact between the flywheel magnet and mag and make sure they are clean and the gap is set ( old school the thickness of a cig. pack) if that doesn't do it check the wire and end for contact. Still no you probably need a new mag

Posted on Dec 28, 2013

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Posted on Jan 02, 2017

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SOURCE: It wont start. Fuels good.

If you have no sign of life with starter fluid, there's no spark in the cylinder.

If the plug is oily, it may spark in free air, but not under compression. Try a new plug first.

Excess oil won't prevent the engine from starting, but it will spew oil everywhere if it's overfilled. Just check the level with the dipstick (on level ground), and pour any excess out of the filler tube.

Posted on Aug 08, 2010

  • 130 Answers

SOURCE: Engine turns over, installed new fuel filter,

Not a whole lot of information here so I'll give it my best shot. Since you mentioned "both spark plugs" I'm assuming this is a riding lawnmower. I'm also assuming since you said "engine still will not fire" that there is no spark jumping the plug gap. There are several problems that can cause the symptom you have but I will address a common one and hope it helps. We are seeing problems in regards to the seat safety switches on some riders. Not necessarily the switch itself, but the connector that plugs into the switch. Some engineer has designed a "mini switch" inside the connector. It's purpose is to keep people from unplugging it and "jumping it out". If the connector is not plugged in securely or if the "mini switch" malfunctions, the mower thinks nobody is on the seat and "kills" the ignition to the spark plugs. Again, I hope this helps to some degree.

Posted on Feb 25, 2011

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SOURCE: 875 Series Engine-cleaned flywheel and

You should put it at .020

Are you sure you had spark before you took it apart? If you are not sure, then the Ignition Coil may have went bad. How did it act before you decided to take it apart?

Jim

Posted on Aug 20, 2011

Testimonial: "After I adjusted and put everything back together again it still didn't work and like you indictated it turned out to be a bad ignition coil. "

  • 6468 Answers

SOURCE: This mower will start but not smooth could armature magneto bee the problem???

check the valve adjustment if overhead valves

Posted on May 29, 2012

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Mtd yardman wont start getting feul no spark detected


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Possible Causes Corrective actions
Unit will not start Control handle is not engaged Engage control handle spacer.gif spacer.gif
Spark plug wire is disconnected Connect spark plug wire spacer.gif spacer.gif
Fuel tank empty or stale fuel Replace with clean, fresh gas spacer.gif spacer.gif
Blocked fuel line Clean fuel line spacer.gif spacer.gif
Faulty spark plug Replace, clean, or adjust gap spacer.gif spacer.gif
Engine flooded Wait to restart, do not prime spacer.gif spacer.gif
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check the gap on your plug. .030 is what it should be. also make sure that your
kill cable is working properly and not grounding the engine out.
the gap for you magneto should be set to .010 to .012
loosen up the magneto insert a standard business card or 3x5 card
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