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Mower cranks over fuel pump working spark to plugs mower won't start?

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The above answers are good places to check, however, any combustible engine needs three things in order to work. Fuel, air, and compression. If the above answers check out, you may have a compression problem. To check, remove spark plug and put one of your fingers over the hole the plug came from and have someone pull on the starter rope or turn on starter, if electric start. Your finger should be forced out of the hole. If not, then you probably have internal engine problem, which could be several things. Valves and or piston would be prime suspects. Sticking valves caused by bent valve stems. Valves not moving due to bad cam. Worn piston rings. Broken piston rod. Etc. These, however, usually give an early warning before giving out. When last used, was there any unusual noise? This implies that there is no or very little compression felt from spark plug hole. Hope this further helps diagnose your problem. Good luck.

Posted on Apr 21, 2017

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Posted on Jan 02, 2017

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SOURCE: lawn mower wont start. changed air filter, spark

Does it turn over? If it does, what happens? Does it sound normal when its cranking? I need more information to help. Is it a push mower or riding mower? Does it start by key or pull start?

Posted on May 01, 2010

  • 10 Answers

SOURCE: Have John Deere 165 riding mower. Strong crank,

Has it been outside? May be water in the fuel.

Posted on Jul 25, 2010

  • 2239 Answers

SOURCE: mower won't start spark plug turns black

Black carbon fouling on the plug is a sign of the engine running too rich, start by replacing the air filter and plug and try again.

Posted on Jun 17, 2012

  • 1 Answer

SOURCE: Snapper Big Six Mower. New spark plug, cleaned carburetor&fuel tank, new 91 octane fuel mower starts with engine starting fluid but won't stay running

Try taking the float bowl off and clean out the orfus. It will eather be in the nut holding the bowl on or in the end (sides) of the pickup tub the nut scews on.

Posted on Jun 30, 2012

  • 4 Answers

SOURCE: cub push mower starts but won't run. i changed fuel and spark plug. what next?

MAKE ADJUSTMENT TO CARBURATOR,TURN SET SCREW COUNTER CLOCKWISE, HALF A TURN,TRY STARTING MOWER,IF IT STARTS TURN QUARTER MORE,THAT SHOULD DO IT, GOOD LUCK

Posted on Aug 10, 2012

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