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18.5 single cyl Briggs riding mower dies after 15 minutes?
I have done the following:
new gas
new plug
new coil
clean filter and screen
The lawn mower will run for 15 minutes and die. Wait 15 and it will run.
Is this problem related to the fuel solenoid mounted on the bowl part number 699915? What is the function of the part? I read that the solenoid when deactivated plunges up and pushes the float upwards killing the gas . It is supposed to kill the flow of gas when the mower is shut down preventing a fire in case of a backfire? When I unplug the solenoid the mower will not crank. I plug it in and the mower will crank and run fine for 15 minutes then it will conk out.
Is it possible that the fuel solenoid gets hot and fails releasing the spring loaded pin upwards and killing the flow of gas to the mower? What would happen If I removed the solenoid and cut the plunger out and then reinstalled the solenoid defeating the safety?
Would that fix my problem? Does anyone know?
I do not expect to get an answer. My questions are stumpers. LOL
I just spent $55 on a dang coil today and I do not want to spend $45 more on a stupid solenoid and that not fix the problem. I have helped so many people out in this forum. I wish someone could help me get my mower fixed.
Thanks Renny. Tomorrow i will remove the solenoid, remove the innards, re-install and see what happens. I will let ya know.
1 Answer
- renpenLv 71 decade agoFavorite Answer
A couple of thoughts. First the only thing that would cause the solenoid to fail is the internal windings. If they get hot and cause the unit to fail you should be able to repeat that failure with the engine off and the key in the run position. How about if you unscrew the solenoid from the carburetor and install a plug? That would tell you if the problem is with the solenoid. Another way to check the solenoid is when the engine quits turn the key to the run position and listen for the solenoid to click. If it doesn't click it probably isn't working. Someone on this site is bound to ask if you check the vent hole in your gas cap. It sounds funny but it has happened.
I just went out and pulled a solenoid off a carb that I have in the shop. Different model engine but the plunger pulls out of the solenoid, so you don't have to cut or damage it, you can just remove it. The other thing I would do is when the engine quits check the voltage to the solenoid connector. The problem may not be at the solenoid. Good luck.
