MF 135 Boiling Fuel

Bigwoods · Jul 19, 2015

I saw a few post where this was discussed. I was mowing and the 135 didn't have the power I am used too. I looked at the sediment bowl and the fuel was boiling.. I have to figure some sort of heat shield to help with this problem. Just asking for any suggestions. Also, is this a dangerous situation? Don't want to be in another explosion.

The metal shields that are spose to be there are present.

maxwell99 · Jul 19, 2015

My friends TO30 boils fuel in the fuel tank when working hard such as plowing.

His tractor does not have a metal heat shield over the exhaust manifold protecting the
bottom of the fuel tank from the heat of the exhaust manifold.

Mr 1957 TO35 does have this heat shield in place, I have never heard any noise of fuel
boiling in the tank.

I would be very concerned about this situation, have you changed fuel suppliers, tractor
need a tuneup, timing off, breather stopped up,

My friend, ruined the motor in his MF135 by letting grass and debris build up in front
of the radiator, got the engine hot, tractor started smoking like a freight train.

Had to have engine rebuilt!!!!!! Costly mistake, happens a lot during this time of year
till fall as dead grass, seeds, bugs, stop up radiators.

Bigwoods · Jul 24, 2015

Thank You so much. I can't believe I didn't see the obvious. Pulled off the grill and the radiator had dirt, cottonwood fibers, and leaves blocking the air. I blew it out and I have my old tractor back. Run smooth!

You probably saved me some $$ and agrivation when it was an easy fix not to mention saving my engine.

Thanks Again

maxwell99 · Jul 24, 2015

Glad you caught it before you hurt the engine!!!!!!!

When I am hogging, I pull up by my water hose, let engine cool down, then come out later
and wash radiator out from the back side forward, you can wash a lot of stuff out like
this. My tractor has an optional bug, debris screen that attaches over the front of the
grill, it catches a lot of material before it ever gets to the radiator.

You learned a valuable lesson here, we all must keep the radiators on these little
tractors clean and clear.
Take care.

ptfarmer · Jul 24, 2015

While I didn't have the problem of boiling fuel I could look at the temperature gauge on my tractor. Here in Texas I run a 160 degree thermostat, and whenever my temp gauge gets around 180 - 190 degrees I knew it was time to clean the radiator (I didn't have a grill door for my tractor) last weekend I put a whole new grill on so it will be interesting to see how having a complete grill new will help. Without the grill door I had to stop several times a day just to clean the radiator. Because I have the Continental 4 cyl gas I really watch the temperature, I don't want to crack the block on mine.

Don-Wi · Jul 25, 2015

Especially last yeari was having the same problems with our jd 425 lawn tractor. And it turned out to be the same problem. Blew it out with the air house and cleaned the screen, quit boiling the gas. Started acting up again a few weeks ago, but this time I was already aware of the exact problem.

Donovan from Wisconsin

MF 135 Boiling Fuel

Bigwoods

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maxwell99

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Bigwoods

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