Question about Craftsman 42 in. Deck 19.5hp Lawn Tractor

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I have a briggs 19.5 twin no spark cranks but no start no spark need help

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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

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SOURCE: 19 hp Twin Briggs and Stratton engine floods after a minute

Replace the float, sometimes they get saturated and look fine but are'nt. Also clean out the jets and bowl. The needle and seat may be worn as well. In other words, rebuild the carb. This time of season, after the equipment has been sitting all winter, I rebuild 25 or more carbs a week. It should cure your headaches, and solve your problem.

Posted on Jun 08, 2009

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1 Answer

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nearly all petrol mower engines need to have the 'choke' engaged to start from cold. This enriches the fuel mixture, and is similar to priming. If there is a prime 'button' then you will probably have to use this all the time. This is normal.

However, you should check with your dealer to see if this is an unusual situation.

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r/
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1 Answer

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