I used 755 the other day! Ran fine like usual!! 1986 I've had it 20 years ! Went to use it next day! Wouldnt start i noticed fuel shutoff wasnt retracting. So i knew to push it in started right up! But a little imconvenient to take side panel off every time to start it! So i took off solenoid noticed black wire was broke off going into solenoid. So figured this was problem! Bought a new solenoid installed it!!! Well now it starts but doing exactly the opposite ! Starts hold in coil works but wont stay running ? Hold in coil only uses 1amp fuse is good ! Any ideas on what problem could be? ThanksFuel shutoff solenoid wont stay in! To keep tractor running ?