Coolant Cap Pressure?

[Sundance]

What is the correct cap for the M-25XP?  I have a small amount of coolant that seems to come from the overflow.  Currently I have a 13psi cap, I can't seem to find the correct pressure for the cap in the manual.  I'm hoping it is just the wrong cap that the PO has used.

[Mike and Joanne Stimmler]

Jeff, The online engine manual shows a 15 psi cap part # 024306.

You can find this by going to our home page, click on manuals on the left side of the page, then parts list.

Mike

[Sundance]

Thank you, I knew it was there somewhere.

[Ron Hill]

Jeff : What you need is a coolant recovery system, not a new cap!!
Wrote an article way back (1990?) in the tech notes about the merits of a coolant recovery system and how to make one. 
VERY simple and cheap!!