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[cqaigy2]

I remembering fighting the heat problem on my robins 22hp. Tried adding heat shielding to the part of the exhaust pipe that was onside the engine compartment. Added high temp insulation wrap to the exhaust pipe. Replaced fuel line with heavy duty one. Added fuel-line insulation and covered all of it.

The one thing that helped the most, was removing the crud that was in the elbow, at the bottom of the fuel tank. I'm guessing it was some kind of white sealant, they use and some must have spilled or dripped inside the tank and made it's way down into the elbow. It was white, and with my less than stellar eyesight, i missed it the first time looking.

About the fuel shut off solenoid issue, I put in a fuel shut off after filling my crankcase full of gas.

The best fix for the fuel issue i was having, was to replace the robins with a kohler. I held off on that fix until i had broken the robins, however.

 

[marrt]

Also...with this much heat, I'd also be worried about the condition of the oil in the engine. Once a certain temperature threshold is reached, oil deteriorates very rapidly. At the very least, I'd definitely consider running synthetic oil. It's cheap at Walmart and good insurance.

 

[m5040]

I only have a PT180, but I would imagine that the heat issue is common with them all. One thing I would suggest that works for me is, if you are working the tractor hard and it is hot, to open the hood and idle the engine about 3 to 5 mins before you shut it off. You may think this is a long time but that is what turbo charged engines are required to do mostly to cool the turbo, but I think it is good practice with these engines too. If I don't the engine wants to keep running with the ignition off, not good.

 

[MossRoad]

I have no heat issues with my 2001 model PT425 and Kohler engine with Kohler exhaust. None. My layout is the tram pump is in front of the engine and my PTO and AUXPTO pumps are behind the engine. The factory exhaust is on the rear of the engine and exits out the rear of the machine, behind the rear expanded steel. While this setup has it's expenses and quirks, like it needs the auxiliary PTO stub shaft on the front of the engine to run the tram pump, and the muffler has to be removed to change the battery, I think it's the best setup I've seen. I originally liked the setup where the engine was in the rear and all 3 pumps were out front along with the battery, I don't like the Power Trac manufactured exhaust systems. I think they should go back to a Kohler engine and Kohler factory exhaust/muffler.