2005 420da purchase w/ 480ce questions

NJMatt50

Member
Apr 28, 2009
225
Jersey Shore
Boat Info
2005 Sundancer 420. Sea lift platform, Axiom Pro, FLIR.
Engines
Cummins 480ce
Possibly buying an 05 420 from a friend with 480ce motors. Boat has 1150 hrs on it, he got it with 1000. The only history I have is a 1000 hr service done by Cummins when he got it 4 years ago. After reading and researching i am a little leary of these motors. Props are original size 22x27, has a hydraulic platform so It might have been loaded up in the past, no idea. I know it runs great but definitely needs some attention. I am thinking props tuned correctly and go through the cooling system, what else should be addressed to ensure long life? Should I be worried about the heads or how it was ran prior? I only hear the horror stories, how many of these are out there stock with no issues?
 
Possibly buying an 05 420 from a friend with 480ce motors. Boat has 1150 hrs on it, he got it with 1000. The only history I have is a 1000 hr service done by Cummins when he got it 4 years ago. After reading and researching i am a little leary of these motors. Props are original size 22x27, has a hydraulic platform so It might have been loaded up in the past, no idea. I know it runs great but definitely needs some attention. I am thinking props tuned correctly and go through the cooling system, what else should be addressed to ensure long life? Should I be worried about the heads or how it was ran prior? I only hear the horror stories, how many of these are out there stock with no issues?

had a friend get one recently and repropped it and replaced the heads almost immediately as a proactive measure. If it were me I’d price in replacement of both heads straight away, too much history on the valve drop to chance it in my opinion. I know it would be in the back of my mind everytime I turned the key otherwise.
 
First of all figure out where out where wide open throttle is..if that’s good then get a Cummins rep to go thru it…. Step at a time
 

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