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3930 new holland ignition switch puzzle

david smalley this new holland 3930 diesel will not start until you move the switch to the run position while the engine is still turning over from the starter turning engine over.New ignition switch,,and wires are all in correct position .Ideas will be most welcome
dave it sounds like you was sold the wrong ignition switch..
Dan McCann My problem is a little different...My 3930 diesel will run as long as i hold the key in the start positon..when i let it go back to the "on' position it dies...I used a jumper from the battery to the fuel shutoff valve and it would stay running .

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