SMX QSC 8.3 / QSB 6.7 Aftercooler Spacer Ring (5297255)

Redesigned by Seaboard Marine exclusively to be far superior than the factory aluminum version. 

1. Made of a tough Thermoset Engineered Composite 
2. A high thermal resistance in excess of 300°F which is substantially higher than the rating of O-Rings in the assembly
3. Non-conductive and impervious to galvanic corrosion, helping to protect your expensive housing, core, and caps from corrosion.

Tony’s Tip:

When I first saw the original aluminum “ring” it only took me a couple of hours to understand that a this was designed without the taking into account real world field experience as to what takes place in inside a “mixed metal”, saltwater cooled aftercooler used in marine service. The OEM design features an added ring & ”groove” and an approx. 1 mm hole through the side of the ring to allow raw water to escape should the O-ring breach internally. This was supposed (I think) to allow the operator of the vessel to “see” (a visual tattletale) something was amiss internally inside the aftercooler. Of course, this would only happen “on paper” as any internal raw water leak would immediately clog the “micro-sized hole” due to salt and electrolysis with the aluminum & copper based alloys. Our in-house shop has serviced not less than 50 of these aftercooler designs over the past 5-6 yrs and everyone has had a “corroded ring” with a clogged hole, and most were never pre-serviced per my protocol with proper “grease & lube.”

In our experience, the best approach is to pre-service the new aftercoolers per our 25++ year old proven protocols and recommend that they be re-serviced in their maintenance guidelines the same way every 2-3 years using those same protocols. Our new ring is made of a material that we feel is far more optimal for this application than the aluminum ring. It’s tough, non-conductive, impervious to corrosion, and thermally resistant.