Question about Black & Decker 19" Electric Lawnhog Mulching Mower with Rear Bag

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Sears Craftsman Lawnmower 917.378072 I can only fill the gas tank half full of gas and than it leaks. How can I fix this?

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  • mawitcher May 02, 2009

    6.25 craftsman; model 917.388340 (number won't bring up anything in Sears' site); won't keep running after warmed up; first try since winter; new gas; new air filter; plug cleaned; magneto assembly rusted, cleaned off; now won't start.
    Q: what are the gaps for the plug and magneto?

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The carburetor on these mowers is artfully simple. There are usually two problems to examine for first: A stuck (or leaking, which could cause flooding) float. And secondly, there is a hair-fine pressure-relief hole in the bowl, so small that if it gets varnished from old gas -- or plugged for other reasons, it is nearly invisible. Make sure it's open. If it's not, the mower can start -- run a few seconds and stop because it has created a vacuum that won't allow gas to flow to the engine. Use a fine sewing needle, carefully to pick out the obstruction until you see through it. Never drill this hole, as any enlargement may send you back for a new carburetor.

Posted on Aug 14, 2009

I had the same problem and I had to replace the tank. Simple job, Sears sent me the replacement tank.

Posted on Aug 16, 2008

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Possible tank joint or cracked

Posted on May 31, 2008

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1 Answer

How do i fix my lawnmower


  • If you are using good quality gas, you may need to change the gas filter or air filter and make sure the gas line is not kinked.
Occasionally, the air filter can be partially cleaned by gently tapping it or some types of air filters can be rinsed and reused.

  • If the gas is contaminated, you will need to remove and/or empty the gas tank and use high octane gas for 2-3 fills.
  • If none of these options resolve the issue, you may need to check and/or to change the spark plug and its connection.
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