B&S Intek OHV 18hp muffler glows red hot

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.

Your PTO safety switch is opening intermittently. Would help if you would always add your model # such as 917.100000 that way I could look up on Sears site and tell you approx. Location of switch.

muffler full of carbon remove muffler heat up red hot throw in bucket of cold water remove and throw as hard as you can on pavement clean carbon out of exhaust part of headt make sure piston is all the way up you dont want carbon in your motor reinstall thank me

You can get one anywhere that sell small engine parts

its the clearance between the rocker arm and the valve on briggs engines i set them to .006

IS THAT A BRIGGS 24 HP

Check the fuel pump.Thanks for asking and I hope this helps out.Please leave me 4 thumbs up.

I also have this same engine and am also looking for the owners/workshop manual . Also went to Briggs & Stratton with no satisfaction. If you find anything please drop me an email aswell. Thank you. [email protected]

Sounds like a mice in your muffler. Its stuck, stop using it, you'll be damaging the valve on the motor. Remove it and test it. Try to remove thing in, i know some people put it in the fireplace to turn it red and burn things (like mice) inside and open up things...

check the safety switches one of them are bad