Have a 140G blade with a 3306 in it. Fuel pressure was all over the place previously, thought I had her nailed with a leaking fuel priming pump. Few days later she won't start back up after lunch. No fuel pressure at all. Got it figured out and started and running again. My fuel pressure is on the higher end of spec for high idle at 31 psi. But low idle sinks all the way down to 16 psi. Operator has no complaints of low power or dying out. But it bothers me a little. Anyone know low idle pressure spec or have a 3306 that can tell me their low idle pressure???
Do you have a serial number? How low is your low idle speed. 16 May not be bad if it idles too slow.
Don't know what my idle speed is sorry. Machine serial number is 72V3444. Engine serial is 3N28012. Arrangement number 2F9637. They tell me it's good now but still makes me wonder. I also wonder where the orfice went from return line. Also forgot to mention fuel filter housing is remotely mounted
That depends on your fuel system. If it's sleeve metering it should have an orifice in a brass fitting (constant bleed valve) that the fuel return line connects to. If you have a new scroll system it's a drilling in the hole the fuel return line connects to. The fuel return is important to keep air out of the system but needs the orifice to hold fuel pressure. Later Bob