Mower dies after running for 20-30 minutes

IMG_7377.png
 
Option number B.)

Yotaman2008

Thread 'Gravley 144z commercial zero turn mower'

In good shape for its age and hours, 926 hours. Runs good and mows good. Good tread on the tires and hold air. Lights work, changed to led pods. Replaced carburetor 2 years ago and only run non ethanol fuel. Put plugs in at the beginning of fall. Will come with a set of gator blades as well as high lift blades on it now. Only known issues is it has a small oil leak, I feel it’s the lower main seal but not sure. It has an idler pulley going bad, makes a roar but it’s been like that for a few years, never gotten worse. Last it is a dual tank mower, will hold 10 gallons but the right side...
 
My Zero turn was doing the same thing. Mine has vent line going to a canister under the seat. The vent line was made out of some cheap plastic and would pinch itself shut. I replaced it with some rubber fuel line and not had an issue since.
 
skyhighZJ said:
Option number B.)

Yotaman2008

Thread 'Gravley 144z commercial zero turn mower'

In good shape for its age and hours, 926 hours. Runs good and mows good. Good tread on the tires and hold air. Lights work, changed to led pods. Replaced carburetor 2 years ago and only run non ethanol fuel. Put plugs in at the beginning of fall. Will come with a set of gator blades as well as high lift blades on it now. Only known issues is it has a small oil leak, I feel it’s the lower main seal but not sure. It has an idler pulley going bad, makes a roar but it’s been like that for a few years, never gotten worse. Last it is a dual tank mower, will hold 10 gallons but the right side...
Click to expand...
I have a 72" cut zero turn with suspension. I will never go back to a smaller cut or a rigid mower!
 
Had a similar issue the other week. Was going across the yard about 20 minutes in and wondering why the last few passes had a shiny stripe in the grass. Then immediately felt the engine start bogging like things are about to stop spinning inside. Apparently a 27HP Kohler has a second oil drain plug I've never seen and it is now somewhere in my yard. 3/8 pipe plug, Loctite and some Lucas fixed her right up.

Yours sounds like a fuel pressure/delivery or vapor lock issue.
 
braxton357 said:
I'm not reading that long ass post, but I bet the valves need adjusted or you have a sticking valve or bent push rod. Also I have some of those gaskets for that fuel gauge, I have to replace them every couple years
Click to expand...
Hahaha, you suck. :flipoff2:

The gaskets aren't leaking, the weephole is:
I'll probably just put a dab of JB weld on it. Then I can see that the gaskets are also leaking ;)

I definitely should check the valve clearance. Haven't done that in 4-5 years of ownership.
 
braxton357 said:
I'm not reading that long ass post, but I bet the valves need adjusted or you have a sticking valve or bent push rod. Also I have some of those gaskets for that fuel gauge, I have to replace them every couple years
Click to expand...
My briggs bent 3 pushrods before I realized the valve guide had slid out of the head slightly causing problems. I taaaaaaped it back in, staked it and hoped for the best.
 
My mom's mower did kinda the same thing but probably not what you're experiencing, still worth a mention. A wasp corpse was floating around the bottom of the tank and would occasionally make its way to the hole in the tank nipple, occlusion it under suction from the pump. Engine would die, suction would stop and the dead body would be released from the hole. Crank it back up and it would be good until it made its way back to the hole. Sometimes immediately, sometimes the next mow.

TLDR: Feed the pump from a known clean can to eliminate a tank issue.
 
Back
Top