I believe it has to do with the main drive belt. (The brake on these types of mowers are almost useless.) If the main drive belt is to short it engages the slip pulley that drives the transmission. I replaced an original belt that was bad with a replacement that was about an inch shorter and my mower would not stop. Replaced the belt again with the exact size required and problem solved ... BUT ...About a month later the same thing happened. The mower would not stop when i released the drive pedal and i ruined my transmission "snapping it out of gear to stop the mower. Now i suspect it may be a worn "slip pulley" causing the main drive belt to ride closer to the spindle on this particular pulley, this , I believe , will cause the pulley to turn faster thus engaging the transmission. This pulley is similar to an adjustable type but it "slips" . On my Troy Bilt it is located in the rear right over the transmission. Hope this helps someone because i have spent hours trying to solve this problem.
how to install a spring clutch on a murray mower
I changed the blade belt on my Murray mower. Now one blade stops and goes. If I lower the deck the blade stop . What did I do wrong?
what size belt do i need with a murray riding lawn mower that is a 12.5hp. 40"
We will need some more details... Is it the drive belt or the belt for the blades?it is the drive belt for Murray lawn mower model 38618x92a
A Murray riding lawnmower owners manual can be obtained from most Murray riding lawnmower dealerships. You can find the owners manual at most local libraries.
30W for summer
The spark plug gap for a Murray 12 hp riding lawn mower should be set at .020 inches. This is equal to .5 mm.
.20
According to Youtube
30 hd oil
To install a Murray 12.5hp 38-inch cut riding lawn mower, first ensure the mower is on a flat surface and the engine is off. Attach the mower deck by aligning it with the mounting brackets on the chassis and securing it with bolts. Connect the drive belt according to the diagram, ensuring proper routing around pulleys. Finally, check all connections and adjust the mower height as needed before starting the engine.
Any inline fuel filter will work.