i have a 753 with the kubota v2203 (older machine, no BOSS). when i turn the ignition key to on, sometimes i have to go to the engine/injection pump and manually move the fuel shutoff solenoid rod before it will start. when i turn the key off, it releases every time. i assume this fuel solenoid is just an electromagnet and that it's getting power since it holds fine once manually moved and releases when power is turned off. does this sound like a bad solenoid and do you think a replacement would solve this problem? thanks