Tractor stumbling with no power

Anonymous-0

Well-known Member
I was cutting my field this weekend when my tractor started to run very rough. I pulled the choke out and pushed it back in and the tractor smoothed out and ran great for another 30 minutes. Now the symptoms are back. I crank up fine, but acts like it is not getting enough or the right mixture of gas. Thoughts? Carb, timing?
 
Disconnect the gas line at the carburetor to see if there's a full stream of gas from the gas tank.
If there's just a trickle of gas you have blockage in your tank. If there's a full stream of gas remove the tube fitting where gas line connects for a screen that may be plugged with crud. Also if your carburetor has a main jet
adjusting screw near the bottom you need to open that as this will enrich the fuel mixture. Which tractor is this? Hal
 
Additional Information:
This is a newly rebuilt engine with electronic ignition. The carb was not rebuilt. I know stupid.
 
Like El Toro said, could be lack of fuel getting to the carb.

There should be a drain plug in the bottom of the carb bowl. Pull the plug and catch some fuel in a glass. See if there is water or sand/rust in the carb. Also while the plug is out, with the fuel valve open, see how much fuel is coming through. It will slow as the bowl empties out, but should not slow to a drip.

Also be sure the gas cap is vented, and the fuel line is routed away from the exhaust.
 
I bought an Oliver 66 years ago and mounted the Oliver mower on it and started to mow hay. I had to turn on one corner going down a small hill. A few feet after I would straighten up it would falter. Long story short. I found a large flat washer in the gas tank.
 

Like El Toro and Steve@Advance said check fuel flow. But you need it to maintain a good stream for a good 20 seconds, If it slows to a dribble you have found the problem, but it could take fifteen seconds before it slows.
 
we had a problem like this had a old wire harness was not getting full power to the coil ran a new wire direct from battery to coil put on dyno and had full power so we rewired the tractor
 

I found out that the head gasket was blown between the number 2 and 3 cylinder. Replaced the gasket and the engine is running like a top. I also had to shave the head because it was a little warped. Right now, everything is okay, but I will know this weekend when I head back to the fields to resume cutting.
 

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