MF50 dies when loaded

Nowbarney · Aug 22, 2019

I have a propane MF50. It ran great all day running a brush hog. The next day I went to use it and it ran great until I engaged the PTO. It dies when the brush hog is engaged and then extremely hard to start. I think it is a fuel problem. It's got good spark. I changed the fuel filter and same result. Really the only thing that seems to be left is the Fuel vaporizer/regulator. This tractor hasn't really been used in years, so wondering if rust is breaking free and clogging the vaporizer. Once started it idles great and sounds good. Just won't run the brush hog with out dying.

Steve@Advance · Aug 22, 2019

Sounds plausible.

Something you could try, get an oil pump can of gas, be ready to give it a shot of gas when the PTO is engaged and it tries to die.

If the gas revives it, good chance the regulator is bad.

Also check the availability of fuel to the regulator. Loosen the line from the tank at the regulator, open the tank valve. Should get liquid propane to the regulator. There may be a separate lock out valve, not sure how yours is set up. If there is a lock out valve, it must open when the engine is cranking and running to supply fuel to the regulator. The lockout is typically vacuum operated.

MF50 dies when loaded

Nowbarney

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Steve@Advance

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