On Oct 24, 9:48 am, hookipa wrote:
I recently moved my boat from New Zealand (cold water) to Tonga (very
warm water) and I am now experiencing very low oil pressure at
operating temperature at idle. ...

I doubt that the problem is the water temperature. As you know lots
of folks make that trip and don't have this problem. I'd change the
oil out for a heavier weight and see if that helps.

-- Tom.

On Wed, 24 Oct 2007 12:59:25 -0700, "
wrote:

I'd change the
oil out for a heavier weight and see if that helps.

Yes, that was going to be my advice also. HD 40WT would be typical
for an older diesel engine in the tropics. You could also bump up
your idle speed a little