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I have a Sears 18 hp ridermower start up good but after run for a half a hour it jus stop ruining like it is out of gas

Like to fine a new or used card 917.254410 ss 0937s06381

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  • Garden Master
  • 2,478 Answers

First check the fuel cap for vent plugged.

Posted on Jan 20, 2013

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Posted on Jan 02, 2017

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SOURCE: Sears 19 hp twin 42 inch tractor, won't start if hot

Hi
Two things come to mind. First it could be not getting enough fuel when hot due to carb adjustment being too lean. That could be that the float level in the carb is set too low or the low speed jet is set too lean. When cold the choke circuit in the carb supplies the extra fuel required.
Second in some enjines that have low compression they start cold but when hot the compression drops below 60 psi and makes starting very difficult until engine cools down.
I suspect a fuel problem.

Posted on Dec 31, 2008

  • 1 Answer

SOURCE: Craftsman 17.5 HP 42 in mower stops after approx 1/2 hour of use

I have an 18 HP B&S 42" Craftsman with the same problem. Carb has been rebuilt and fuel filter replaced. Have cleaned the vent hole in the fuel tank cap. Nothing has helped. Choking the throttle will keep it running for a few more seconds but it eventually stalls out only to start again in 5-10 minutes which keeps me thinking its a fuel, not electrical problem. Maybe overheating but how can you tell if its causing vaper lock?? Submitted by Redroadster.

Posted on May 03, 2009

woobie dog
  • 1273 Answers

SOURCE: my sears riding mower stops running when gas tank

Hi, W/D here.

Sounds like you're machine is pulling a partial vacuum on the tank when it is running, and starving itself for fuel. Check the fuel filler cap vent pinhole. If it is plugged, the mower will do just what you're saying.

Best regards, --W/D--

Posted on Aug 13, 2009

  • 138 Answers

SOURCE: i have a craftsman gt 6000 with kohler 18 hp

Your carb is full of trash. you also probaly need to clean out the bottom of your fuel tank, blow out your lines and replace the fuel filter. I have 2 mowers with kohler engines and clean out the fuel tanks fuel lines and carbs 1 time a year. There is also a fuel shut solenoid on the carb this is normally problem if the engine does not run. but I am certain your problem is a simple fix, all you have to do is clean everything out in the fuel system.

Posted on Sep 13, 2009

SOURCE: Early 1990's 12 hp tecumseh runs until hot then backfires & dies

Coil failure! The heat is what triggers it. I bet you that if you take the cover off the engine you will find the remains of an mouse nest. The nest blocked the airflow and damaged the coil.

In the spring the shop I work at gets a lot of this kind of problem. Critters love to build nests where they feel safe from weather and predators. Your mowers engine....is just one of those places.

Good news is: You can easily replace the coil yourself. The part for this style mower is available online....even through ebay! You can do the change yourself and make her good as new!

Just as an aside. You may want to check compression on your engine if it ran hot for so long. Make sure the combustion chamber isnt packed with carbon and oil coking! If you have pull start and notice higher than normal effort is needed to start it might be a sign of this problem.
The fix there is also pretty simple. You just need to order a new head gasket. Hey....while youre waiting for a coil why not wait for a head gasket right?

Posted on Jul 19, 2010

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