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I have a QSC 600 in my boat. Can confirm that aft fuel cooler zinc is a dog to replace. The way my engine is mounted on the stringers, it requires a VERY specific sequence of motions to get the wrench on the bolt so it can be turned.I have an ‘07. The QSC-500’S haven’t let me down. They are electronic controls so it’s not like old days where you could McGyver a temp fix to get home. I keep some spare sensors on board just in case but haven’t needed them. My only real complaint is that the zincs in the port side fuel/oil cooler are a real chore to replace.
I thought my 44DB with the QSC500 was underpowered but I only thought that after having a 52DB and 58DB; those boats flew compared to the 44 with QSC. I would characterize the hull/engine combo as adequate, it certainly doesn't suck.About to purchase a 2006 44 Db with Cummins QSC 8.3 engines Heard they are a great match for the hull Thoughts?