It's been awhile since I've posted here but since some of the guys with older boats have the AQAD40A and B motors I thought I would pass along a tip.
One of my engines has run a little warmer than the other one. Based on a tip at boatdiesel, I removed the pipe that goes from the seawater pump to the oil cooler. There was some major saltwater blockage in this pipe. I cleaned it out by filling it with vinegar and letting it sit for a few hours before flushing it with a fresh water hose. A lot of salt came out of it.
I'll probably do the other engine now that I know how good it works.
Bob and I also got some nice albies (5 @24-25 lbs on a certified scale) and a 26.3 lb Yt at the west butterfly last Saturday (8/4/07). We fished 8 and 12 lb test. Had we been on a major meat trip we could have filled the hold on the Tunacious.