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I have 5 of these Nason low pressure switches (2 port and 3 starboard) on my DD 6V92 625hp motors. They are tied into the fuel lines above the secondary fuel filter. Here is my problem. A mechanic was working on the boat and concluded that the switches were bad and needed replacing. He...

Looking for a Detroit Diesel mechanic recommendation for East Central Florida (Melbourne, Cocoa Beach, etc). Need more than a routine maintenance guy. Thank you in advance.

Looking for a Detroit Diesel mechanic recommendation for East Central Florida (Melbourne, Cocoa Beach, etc). Need more than a routine maintenance guy. Thank you in advance.

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Here's the quick history. I own a '98 550DB with DD 6V92 625hp motors with 1750hrs. I've owned the boat for less than a year and I don't have much of a history. The survey (from a reliable Detroit guy) came back great. Last week, I was running for about 2.5hours at 1750rpms at 170 temp...

My fuel Cross Over Board has a fuel return valve (off/on/return) below the Generator fuel valve. Is this valve only for the Generator? If yes, shouldn't there be a pair of valves for the motors? If no valve is needed for the motors, why is there one specifically for the generator?

My "new to me" boat came with a 220v pump and a 24v back up. At some point the previous owner removed the 24v pump leaving only the original 220v pump. This pump is original and runs all the time, it needs to be replaced. The way I see it, I have two options. 1. Replace the two pumps as...

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I'm currently in the middle my survey window on a 1998 550DB with 6V92 DDEC engines. The generator is a Westerbeke 15KW. The results of the motor survey are acceptable. There is life left on the motors. The only major issue is that the aftercoolers have never been serviced. I can...

I'm looking to purchase a 1998 55DB with DD 6V92 DDEC 625HP. Yes, I've read EVERYTHING on the net regarding these motors and I understand the bad and the ugly. What I don't see online is the GOOD. Is there anyone out there that has these motors and has good things to say. I understand...

I've been looking at the 44EB for a few years and finally ready for the plunge. Can anyone provide me with some opinions of the CAT 3116 vs the CAT3126? Other than the obvious hp differences, what can the forum tell me about the two motors? I've read/heard that both had problems in the...