Hello all. Completely new to 2cyl's. I have a 48' B serial #224xxx. I have a kinda crazy question, the tractor has a oil pressure line coming out of the crank case just behind the governer housing which goes to a "valve" just in front of the sediment bowl and makes a 180* back to the oil pressure gauge. Does this sound right?? Wouldn't it mix oil with fuel? The original owners manual and IT manual doesn't touch on it.