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Can anyone recommend a Cummins certified surveyor for a pre purchase engine survey and inspection of QSC 8.3's in the Norfolk VA area? Thank you!

I was told that on the QSM 11's people are having to change the exhaust manifolds every 4-5 years due to wear and corrosion where it mates to the block causing leaks that are evident by the soot streaks. Is this also the case for the QSC 8.3's? And on the QSC 8.3 540hp are there any weaknesses...

I’ve got a pair of 2005 420 Sedan Chairs I removed to replace with new chairs instead of re upholstering. They are functional but definitely need to be re upholstered. Not sure what they are worth as is, make offer. A bit big and heavy to ship so local to Daytona Beach/St Augustine area I can...

We have decided to sell our 420 so we can upsize to hopefully a 560DB or else a pilothouse. Purchased in 2021 and has since lived in freshwater of the St John’s River behind my house. Since purchased, the entire flybridge enclosure replaced. All new Garmin electronics except still using the...

Let my loss be your gain. For Sale new MairnAire MSBA16K2 Heat/Air unit. Only unboxed due to attempt to install. While the dimensions of the unit matched the previous unit, do to fittings in the boat this unit would not fit without major modification. I have been told that other boat models...

As my hearing is apparently degrading over time, I've noticed that while underway with enclosure open for airflow I am not always hearing if the systems monitor alarm beeps on. Last week I had a water leak while underway that set off the alarm due to bilge pump running a bit and I barely heard...

Please excuse me if this has already been posted about… I have a 2005 420 sedan bridge and also posted on that section. I’m going to install solar panels for charging up batteries, and while I’m doing that I’d like to install an inverter. my questions are: Considering I already have the factory...

On my 420 DB the fwd ac compressor will continue running no matter what I select on the thermostat, including off. It ran long enough non stop that it completely iced over the evaporator and lines when I went to check on it. Only way to shut the compressor off is to trip breaker for that ac...

My 420DB has 23x26 wheels. How would rpm change in theory by changing to 24x24, both being four blades? Thanks

I’ve got a model MDKAV 9 KW in my 420DB. Today went to start it up and within a second of starting it shuts down and displays a 3 flash service code on the start/stop switch. The codes sticker says 3 flashes mean service required. Can anyone point me in the right direction? It has oil and...

My apologies if it's been posted already, but can someone tell me about changing oil in my ZF280a's on a 420DB? Can I use a vacuum type oil change set up to suck the oil out through the dipstick hole, then refill through same hole? I was trying to not pull the plug on bottom and have any engine...

I have a 9kw onan I need to replace end cap and seals on one end of heat exchanger. Do I need to drain it before opening the end cap? Do I need to clamp off the coolant lines before removing the end cap or does coolant stay captive and only the raw water will drain out? Thank you!

This anchor came with then420DB I bought earlier this year and I replaced with different anchor. It’s in good shape and does not appear to be damaged. Comes with a swivel. Can meet Local Jacksonville to Daytona beach area due to size and weight. Asking $500.

I removed a working radar to replace with new. This raymarine came as original equipment on my 2005 420DB. I’m not 100% sure but I think it’s a 4kw pedestal. It is 12 volt, and I have all the wiring with it. It was connected to a C120 chartplotter. Due the large size and heavy weight I’d rather...

I’m selling the anchor that came with my 420 DB I bought earlier this year. It’s a nice stainless claw/Bruce type. Asking $650. Would rather not get into shipping this beast. I can help deliver in St Augustine to Daytona Beach areas.

I have a Garmin 1243 that I would like to add a couple video cams to. The manual says "A Garmin®Marine Network PoE Isolation Coupler (010-10580-10) must be used when connecting any third-party device, such as a FLIR®camera, to a Garmin Marine Network. Connecting a Power over Ethernet (PoE)...

I need to install a new transducer to get more than just digital depth. As opposed to the typical “football” shaped large transducer has anyone installed one of the large, round flush mounts with tilted elements? The boat only has one small round transducer installed for just digital depth...

I’m working on closing deal on new to me 2005 420sedan bridge with Cummins 430hp. It does not have the digital smartcraft display or other display that I’m aware of. Can somebody tell me what does it involve to install a smartcraft or connect it to MFD’s ?

Hi all, We are looking for our next boat and three models of interest are the 370 EC, 400 & 420 Sedan Bridge. Looking between model years 1999-2005. Looking for diesel powered models, preferably in the Southeast as I am in Florida. When looking at these models, are there areas we should focus...

Good evening all! Pardon the seemingly dumb question, but as a newbie to this site and possibly the Sea Ray world I wanted to ask if there is a thread on here explaining what the letters after the model size means? I have searched but not found it if so. What I mean is I'll see something like...