Thanks for the Postings.
Well I did find the information in a pdf document called '
02-Elco_Parts_Catalog_S-Pass'. at www.ptboatforum.com
'- Digital Microfilm Files by Al Ross & Richard J. Washichek (Dick Washichek) / Al Ross Jr. / www.ptboatforum.com - DO NOT COPY, DUPLICATE, DISTRIBUTE and/or SELL'
Due to the above cannot post diagram.
Basically the centre engine has two inlet scoops and two outlet scoops (same scoop but face opposite direction) the side engines only appear to have one inlet and one outlet each (but there is a complexed control panel and each scoop has a on/off valve. lot of heat exchangers/ oil and exhaust coolers).
I found a diagram of the/a electrical generator which also has its own cooling scoops.
Ok sorry about drawing,
Main engine outlets are 11+7/8in towards the bow from frame 61
Main engine inlets are 7+1/4in towards the stern from frame 55
Side engine inlets are 13in towards the stern from frame 47
Side engine outlets are 3+1/2in towards the bow from frame 52
I estimate the Side engine inlets and outlets are 20in from the side engines centre line.
please note only for PT 103 to 196,PT 314-318 and PT 362-367.
Frames diagrams at:-
When you scale these measurements they become fractions of an inch eg 3.5 inches at 1:20 equals 0.175 of an inch.
Thanks again Roy