Next items are some heat exchangers. I have 2 sizes available.
#1 -All are new, some were installed into production machines, some received oil, others not. The oil we use is a Shell mineral oil, there could be a light residue left inside on some that had been filled. A design change on the equipment these were destined for that required different heat exchangers. About 20 are available at post time.
The smaller ones are a 2" diameter Cu/Ni device with 1/2" NPT fittings for both water and oil. There is a drain plug for the water chamber, and a spot for pencil zincs at both ends. The overall length is around 19" This is a single pass type device. The manufacturer is SenDure of Fort Lauderdale
Price is very reasonable at $95 each.
#2 - The second coolers are 3" diameter and around 23" long. All are new. They are also 100% Cu/Ni (cupronickel) construction, have both drain and pencil zincs installed. This is a two-pass design set up for 1/2" NPT fittings for both oil and water. Three of these were installed but never used, the balance are still setting in the OEM boxes. These were built by SeaKamp of Seattle. About 20 are available at post time.
Mike, coolers don't really have HP ratings, more of a cooling rating thing. For example, HP is sort of irrelevant in the relationship of heat. It depends on the load, the type of boat, how hard it is run and for what length of time and probably a myriad of other factors.
I would rate these coolers on the conservative side in general, their primary limitations being fitting size. Although 1/2 NPT will pass a lot of fluid, there are apps where it simply isn't enough. Those can't be defined by HP alone. As a rough guide, anything that requires 3/4 or 1" NPT elsewhere in the cooling circuit won't be a good candidate for these coolers to be run in series with that size line.