Vent screw size for pressure fitting?

[hallhen]

What size fitting would be used in the vent hole for a pressure test?<br /><br />Where can I find one of these fitting that I will attach to a bike pump?<br /><br />Mercury75 7.5hp S/N 2813717

 

[Yepblaze]

Re: Vent screw size for pressure fitting?

Take an old, or new, bicycle inner tube and cut out the valve stem. Now grind the rubber end to a blunt taper. Screw that in the hole then pump away. Not too much pumping though or you could cause more of a problem than you have now.