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    • QSC 550hp 35 Cabo Flybridge

      This topic has 5 replies, has 3 voices, and was last updated byTony Athens 6 years ago

      November 3, 2017 at 12:04 pm I purchased the last 35′ flybridge ever made. I was told by the previous owner that he regularly ran at 2450rpm at 27knots port motor 171 degrees and the starboard running 172 degrees. I have been running them at 2430 around the same speed but the port is at 172-174 degrees and starboard 174-176. I am curious if this is well within the operating range or if I have to pull the heat exchangers and coolers and get them cleaned and pressure…

      Started by: Mike E in: Cummins Marine Engines

      5 Replies
      November 13, 2017 at 8:33 pm Mike, Make your aftercoolers a serious maintenance priority……….They suffer quickly from “Marine Age” as they were assembled dry at the factory.. Since you have 540’s, that means not less than 7 yrs of “Marine Age”? Not good and there is a good chance they will not be serviceable regardless of all the tricks we have learned over the last 25++ years doing this.. Tony

      Last Post by: Tony Athens posted: 6 years ago

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