Question about Desa International ALL-PRO® SPC-85 Utility Heater

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Misfiring Master Heater

I have A Master heater B99 deluxe. after it run for a fe minutes it misfires. i have changed the plug.it only misfires for a second.I also have checked the fuel line and pump. it seems to be an ignition problem

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  • 232 Answers

Check:

  1. water droplets in the fuel tank
  2. transformer not grounded good
  3. restricted fuel filter- causing starvation
  4. air pump pressure not correct

Posted on Nov 23, 2008

  • Dewey Newbury Jan 09, 2012

    I had the same trouble it was the high-tension (voltage) line was shorting to ground. Once I insulated the line, it stopped misfiring.

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