Originally Posted by delawarebill
just got this '51p/u yesterday.. i would like to know if the oil pressure gage (dash) is working correctly.. so my question is where do u tap in or plumb in tubing for a mechanical gage.
i also think i'm needing to pull the carb apart.. starving for fuel. been sitting for 4 yrs during it restore job.. idles good. and while i'm at it.. that oil canister ?? how do u drain it for oil changes.. and how much oil does it take ??? more dumb ????? to follow.
Bill the oil pressure fitting is on the passenger side on the back of the block. Unscrew the electric sensor and install the line to your mechanical gauge. Flattheads are known for low pressure at idl after theynget some miles on them. 5-10 pounds at idle with the engine hot is not unusual.
I have a pretty well built 51 Merc engine with a freshly turned crankshaft and it will idle hot at about 22 lbs. Going down the road it will run around 50 lbs.