harrold philippi

I have read in the POH and it states "fly for one hour, switch tanks, fly on the second tank until fuel is exhausted. Than switch back." My question is, since I do not have a low pressure warning light how much time do you have once the pressure gage starts oscillating before the engine quits running? I have attached page below.

For anyone who has a gear problem this is a picture of my pressure switch.

I think this the old style switch

Thank you for the picture I have inspected the landing gear nose and mains and it does not appear that I have a switch in those locations. I was reading that some of the c models had the squat switch under the belly pan. I am going to look behind the airspeed indicator before I remove the entire belly. I will post the results later today.

My airplane is a 1969

Does anybody have an idea where to find the squat switch on a M 20 C