T&T: oil gallery on Yanmar engine

[Larry N. Brown]

I'm in the process of installing a GCF O-1 oil bypass system on my machinery.
Have the genset set up and it is working fine. Having trouble with the Yanmar
4 LHA engines, however. On my old FL, I just T'd off the mechanical oil
pressure gauge and got my flow for the O-1. Tried the same thing on my Yanmar.
No such luck. Apparently inside the vibration-dampened block the oil pressure
sender and low-oil pressure switch are mounted on, there's a very small tube
that allows just enough oil to feed them. Not nearly enough to supply 30 GPH
O-1 requires. I know there has to be access to the high pressure oil gallery
to where I can screw in an adapter. Does anyone here on the list know where
this may be?

Regards,

Larry and Teri
M/V Cigano, 47' Prairie Sundeck Cruiser
Lying: 64 Cypress Road
          Covington, LA