I have an x748 with the yanmar. The fuel shut off solenoid on mine bolts on with 2 bolts, it has a pin or needle that sticks out on the end that goes into the pump. This is spring loaded to push against a plate on the inside of the pump when key switch kills power to the circuit. There is a relay that sends power to the solenoid electromagnet to pull the pin back to allow the machine to run. you can take that solenoid off and start the engine, it will leak oil out of the hole but will let you know if it runs or if you have another problem. If the engine runs with no solenoid then you have a relay problem or an issue with getting power to the solenoid. It doesnt have any fuel to it so doesnt need bled. If you think its a fuel issue then start with the filter housing connections and work your way back to the tank, low air pressure applied from the supply hose at the filter might help you find any leaks you might have. The relays on these things are a bugger to diagnose, i converted mine to a manual shut off. As for the long bolt i dont know wht it is or how its adjusted but based on what you said i would say its just a bump stop for the governer to limit rpms, if its out i would have something to put over the air intake if it starts as it might open up without that bolt in place.
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Today's Featured Article - The Day Mom Drove the 8N - by Brian Browning. My Dad was wanting to put in a garden but couldn't operate the 8N and handle the old horse drawn plow he had found and rigged up to use with the tractor. Well, he decided to go get Mom out of the house and have her drive the tractor while he walked behind the plow. You got to understand that while my Mom is a hard worker who will always help whenever she can... she had never operated farm machinery before that day. Dad got her out there, explained how the clutch was the same as in our o
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