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 - Listening to Your Tractor - by Curtis Von Fange. Years ago there was a TV show about a talking car. Unless you are from another planet, physically or otherwise, I don’t think our internal combustion buddies will talk and tell us their problems. But, on the other hand, there is a secret language that our mechanical companions readily do speak. It is an interesting form of communication that involves all the senses of the listener. In this series we are going to investigate and learn the basic rudimentary skills of understanding this lingo.
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