Let's talk thermostatic oil cooler sandwich adapters!
04-14-2016, 08:40 PM
#34
Registered
I believe on a Mark 4 you would need the Earl's 504 with the spacer to clear the recess of the oil pad.
Platinum Member
04-15-2016, 12:15 PM
#37
Are you talking about the passages in the adapter, or are you asking what size lines to use? I am pretty sure the passages in the adapter should be large enough to not present a restriction. They are larger than what you see with most of the #10 and #12 AN fittings. If you are asking about hose size, someone suggested #12, and I concur, especially if you are making longer runs with your lines. I think I probably used #10, but I only had a total of maybe 18" of line to and from my cooler, and I generally don't run my boat hard for more than a few minutes at a time. As the saying goes, your mileage may vary - if you want to play it safe, go with #12. I'm also running a stock size cooler, which most people will recommend against, but once again I don't run mine hard for more than an occasional short burst. If you like to hold the hammer down for several songs in a row, then probably best to upgrade to a larger cooler. I think what makes it work for me is having the filter right down there on the block and eliminating all the extra hose and restrictive elbows associated with remote oil filters.
