[SEL] National Gas Engine

[Vivas1993 at aol.com]

Hi folks,
 I've bought a 9 1/2hp National Gas engine made in the UK, the engine  dates 
around 1905-06. I'm guessing that the nuts & bolts on this engine are  the 
Whitworth type threads. 
Is there a source for new studs, nuts & bolts, because several of the  
original ones are in bad shape.  A reprint of a manual for this engine  would also 
be very much appreciated.
 Thanks,
 Dwight Vivas
 Petersburg, VA.