I have a 12.5 hp Briggs & Stratton on a Murray that did that. The carburator is right above the muffler and when I replaced the muffler, I didn't put the heat shield between the muffler and carburator back on. The added heat from the muffler was vaporizing the gas in the carburator where the engine would no longer run once it got hot. Replacing my heat shield and putting a longer pipe on the muffler to get it away from the carburator solved my problem.
SOURCE: 18hp/ohv craftsman 42in wont crank
One thing to check, see if there is a piece of root stuck under the tractor there is interrupting any of the security features from allowing the tractor to start. It might be a small piece that stops a plunger from engaging.
SOURCE: 15.5 ohv briggs and stratton
It could be "starving" for gas, not getting enough gas. Check the plug, if it is white then the engine is running to lean and will overheat. If this is the problem, then the carbertor will have to be adjusted, and or cleaned, or replaced.
SOURCE: I have a problem a Craftsman 18hp 42 in deck--it stops running.
The problem is called vapor lock. It occurs when the fuel in your supply line is vaporizing just before it gets to the fuel pump and the fuel pump is not designed to pump vapor so you run out of fuel.
Possible solutions are to re-route your fuel line so that it doesn't get hot from the engine and/or run the mower during the cool parts of the day only. It might be as simple as getting some new gasoline as winter bought gasoline will always vapor lock if used in the summer time as they alter the formula for gasoline on weekly basis to stay ahead of vapor lock problems nationwide. Way back when cars were mostly carbureted it was a MAJOR summer time pain. The three options given above remain the best solutions for this ages old problem.
SOURCE: craftman 18hp briggs @srat starts then cut off when it gets hot
I hope all that time and money was worth it - there are classic symptoms of a blocked gas cap vent. Vacuum forms in tank - no fuel flow - engine stalls. Wait a bit - air leaks in, engine starts again (for a while.....).
To completely elimnate a chassis wiring issue, simply disconnect the mag cable from the engine. The only possible culprit if there are still electrical problems is the coil itself - which you already replaced.
SOURCE: I have an 18hp 42inch cut Sears Craftsman, it will
check the gas cap vent little hole on top of cap clean with a pin-check and or replace air filter -check and or replace inline fuel filter if still not running correctly need to clean and repair carb
223 views
Usually answered in minutes!
×