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Craftsman lt1000 My mower starts and runs great for 20 minutes then starts to rev up and down, up and down then dies, I have to wait for about an hour to run it again then does the same thing after 20 minutes. Any ideas?

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  • 7 Answers

If it has overhead valves, get the specs from the engine manufacturer and reset the valves. this should cure the problem.

Posted on Apr 16, 2014

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Posted on Jan 02, 2017

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SOURCE: lawn mower runs well from cold but if stopped won't start

Sounds like it's running rich. If the mixture is slightly rich it will start well when cold, but when hot it floods. Check the air cleaner to be sure it's not clogged/blocked. Get a new plug for it and if this happens again just install the new plug - the new plug won't be fouled with fuel. If it started with the new plug then you're on your way to a carb adjustment (that is if the air filter/cleaner is clean)

Posted on Aug 29, 2009

  • 67 Answers

SOURCE: Cub Cadet 2165 Mower Shuts Down

did you happen to check the gas cap if the vent is clogged in it ? when it stalls loosen the gas cap and see if it makes a whoosh sound

Posted on Sep 01, 2009

  • 54 Answers

SOURCE: I have a John Deere riding mower with a B & S

Possibly a restricted carb, or float level (if it as one).

Posted on Apr 28, 2010

  • 252 Answers

SOURCE: my craftsman lawnmower 917.378941 runs about 10-15

provided fuel flow is consistant and fuel tank beather is clear

sounds like the magnetron coil assy is going open circuit when hot
replace the magnetron with same type of unit as fitted to engine

two types could be used

1, standard magnetron ( has a piece of card between the halves of the iron lamination stacks

2 advancing style magnetron this unit looks like the standard one
except it has no card and has a wideish back gap at the ends of lamination stack

which ever one is used use same type

here is web site for parts

enter model and type numbers from blower housing on engine

good site check it out

cheers paul

Posted on Aug 02, 2010

  • 2239 Answers

SOURCE: cub cadet dies 20 minutes after starting

Slacke off the fuel filler cap when it starts to die, if it picks up again the fuel tank breather is blocked.

Posted on Apr 14, 2012

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