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I have a troy bilt 690 series 190cc self propelled lawn mower that won't run. I have changed the carb, spark plug, oil, and gas. The fuel line is not blocked because when I pulled it off the carb it poured out gas before I could plug it. I borrowed my wife and she held the spark plug against a bolt on the motor and when I pulled the cord she was able to see blue sparks. I sprayed ether into the carb and I still can't get it to start. Most of the time I pulled the cord and everything spun but nothing happened. On three occasions I have been able to get the mower to start but it stops after running for approximately 1 second. I examined the kill switch and everything appeared to working. I don't know what else to check.

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  • 969 Answers

Pinch off or turn off fuel line to carb. Remove carb from engine. Remove carb bottom bowl. Observe screw that holds bowl to carb if it has a whole thru it clean it out with a bread wrapper twist after you peal back about an inch of wire. Remove float and needle, use same wire to clean out port. Use same wire to clean out center fuel pick up port in center of carb. Ensure upon reassembly the float is free to move. Float up no fuel flow, float down fuel flow.

Posted on May 24, 2014

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6 Suggested Answers

6ya6ya
  • 2 Answers

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Posted on Jan 02, 2017

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highspeedsan
  • 61 Answers

SOURCE: 6.75 B and S push mower wont start.

Check the kill switch. It may be stuck in the off position.

Posted on Apr 26, 2009

  • 93 Answers

SOURCE: BRIGGS/STRATION 675 SERIES, 190CC SELF PROPELLED

Rust on the Flywheel and Magneto wire brush off., Pluged Fuel Filter or Bad Gas.

Posted on Sep 14, 2009

RonInFla
  • 86 Answers

SOURCE: Troy Bilt lawn mower used months 2009 will not

stale gas in carburator...take the screw out of the bottom of the carb and let the gas run out...

Posted on Apr 18, 2010

  • 152 Answers

SOURCE: LOOKING FOR A MANUAL FOR A 21" CUT SELF PROPELLED

try putting your serial number and model number here. http://www.troybilt.ca/troybilt/troybilt_manual_search.asp

Posted on Aug 08, 2010

  • 251 Answers

SOURCE: My Troy Bilt self propelled

Hi , it can often be something as simple as the engine needing a oil change as oil looses viscosity/thins with use ( use correct grade ), replace or clean the oil filter and a good service or something more complex which requires a full engine stripdown like worn piston ring/oil scraper ring causing oil to flow up the cylinder walls and fouling the combustion chamber or oil leaking up through the valve stem oil seals , also storing the machine tilted can cause oil to collect in the chamber or petrol to leak into the sump causing the oil to thin.
Hope this helps , please rate accordingly

Posted on Aug 31, 2010

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Hi , it can often be something as simple as the engine needing a oil change as oil looses viscosity/thins with use ( use correct grade ), replace or clean the oil filter and a good service or something more complex which requires a full engine stripdown like worn piston ring/oil scraper ring causing oil to flow up the cylinder walls and fouling the combustion chamber or oil leaking up through the valve stem oil seals , also storing the machine tilted can cause oil to collect in the chamber or petrol to leak into the sump causing the oil to thin.
Hope this helps , please rate accordingly

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