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Thread: 420 DA Thread

  1. #21
    Join Date
    Oct 2006
    Location
    Netherlands Europe
    Boat
    Sea Ray
    Details
    360DA '03 6,5 kw kohler generator, AC, etc.
    Engine(s)
    Yanmar 315Hp diesels
    Posts
    1,165
    Hello 420 guys, here a little 360 guy

    Here are the building photos from Robski !!!!

    I think they are a very interesting input on this thread!!















    360DA 2003 Yanmar "oil burners" 315HP

    "Outsider"

  2. #22
    Join Date
    Oct 2006
    Location
    Kentucky
    Boat
    Looking/Going smaller
    Details
    N/A
    Engine(s)
    N/A
    Posts
    989
    Rob, Those are some great pic's. Did you get the washer/dryer option? If so where did they put it? JC

  3. #23
    Join Date
    Oct 2006
    Location
    Jersey Shore/Venice FL
    Boat
    Sea Ray
    Details
    2001 410 Sundancer
    Engine(s)
    Caterpillar 3126TA
    Posts
    2,043
    Frank H.
    FBHO MOLON LABE

  4. #24
    Join Date
    Jan 2007
    Location
    North Bellmore, NY
    Boat
    SeaRay
    Details
    44DA
    Engine(s)
    Cummins QSC 8.3's
    Posts
    1,564
    Thanx for posting the pics.. I was having resize issues...

    Gettign the pics sent to me during its creation ... really helped ....

    Hope u guys enjoy em....

    One thing that surprised me was the amount of plywood...

    oh and the size of the speakers in the couch.....

    KIDS LOVE THE STEREO... the entire doc gets to hear high school musical..


    Rob
    44 Dancer, JUST 4 PLAY

  5. #25
    Join Date
    Jan 2007
    Location
    Maine/Florida
    Boat
    Sea Ray
    Details
    2005 320 DA
    Engine(s)
    350 Mag
    Posts
    74
    A question for skip:
    After moving up from the 320, what is the difference in your gph?

  6. #26
    Join Date
    Oct 2006
    Location
    Gulf Shores AL
    Boat
    Sea Ray 19 SPX OB
    Details
    Previous 220SD, 260DA, 300DA
    Engine(s)
    Mercury 150 4S OB
    Posts
    4,149
    Wow those pictures are great!! Thanks for posting them. Robski97, Did you just ask them to send you pictures when they were putting it together?
    [SIGPIC]Current 2016 SeaRay 19 SPX OB
    Previous boats
    2006 SeaRay 300DA. Twin 350 Horizon Bravo 3's
    2004 SeaRay 260DA. 350 MPI Bravo 3
    2003 SeaRay 220SD. 260 MPI Alpha 1
    1988 Wellcraft 210 Classic. 260 HP 5.7 EFI Bravo

  7. #27
    Join Date
    Oct 2006
    Location
    Potomac River/Chesapeake Bay
    Boat
    Sea Ray
    Details
    07 52 DB Truly Blessed III R6800 CRM MANs Thundering Towers of Teutonic Torque 2010 Nautica 12' RIB,
    Engine(s)
    MAN R6800 CRMs
    Posts
    1,060
    I gave my 320 log (i think) to the family who bought the boat from us. With 350 MAG Horizons I cruised at 3800-4000 RPMs and got around .85 NMPG (going on memory here) and I think it was a fuel burn of 24-26 gph. The 450 Cummins in the 420 turn 2100 RPMs at cruise and burn ~24 GPH. So--fuel burn is pretty close, but the 420 is going 3 knots faster and the diesel fuel is about a dollar less per gallon than 93 octane where I typically fill up.
    The other issue is load--we typically loaded the 320 up with full fuel, water, guests, gear, and those 350s were really, really working hard to stay on plane if we had a lot of wind and current working against us. I had 14 people on the 420 last summer with all their gear, full tanks, etc. and the cruise rpm, speed, and time to plane were just about indistinguishable from the regular load of 2 adults, two kids, and our gear.
    According to my 420DA log: in 2006 we ran 147 hours, and burned 3020 gallons of diesel for an average of 20.5 GPH. I have no "no wake" zone to contend with at my Marina, so most of my run time is on plane at 2100 RPMs. I am pretty happy with the economy of the diesels given that I am pushing 45 LOA and 14-15 tons of boat on a 14' beam.

    regards,
    Skip

  8. #28
    Join Date
    Jan 2007
    Location
    Maine/Florida
    Boat
    Sea Ray
    Details
    2005 320 DA
    Engine(s)
    350 Mag
    Posts
    74
    I know the feeling about the 350 mags. Whenever we go for a cruise full fuel, full water a few people and lots of gear aboard the boat just feels sluggish. We also have worse economy at .5-.6 mpg over this past season usually in the 3300-3800 rpm range. A good bit of time we ran in rough seas so I am taking that into account with my mpg calculations.

    Now for another question, how is the ride compared to a 320.

  9. #29
    Join Date
    Jan 2007
    Location
    North Bellmore, NY
    Boat
    SeaRay
    Details
    44DA
    Engine(s)
    Cummins QSC 8.3's
    Posts
    1,564
    Bridog,
    I asked for the pics.... They were great about it ...

    I love the boat... Great manners.... Been in some snot... 4- 6 close together... She was a champ....

    Couldnt ask for a better ride.... or a better power plant...

    Im sure skip can add alot more....


    Rob
    44 Dancer, JUST 4 PLAY

  10. #30
    Join Date
    Oct 2006
    Location
    Potomac River/Chesapeake Bay
    Boat
    Sea Ray
    Details
    07 52 DB Truly Blessed III R6800 CRM MANs Thundering Towers of Teutonic Torque 2010 Nautica 12' RIB,
    Engine(s)
    MAN R6800 CRMs
    Posts
    1,060
    It is really hard to compare the boats. The 420 is much bigger (10' LOA) wider (2.5') and heavier (almost double the weight-7 tons vs just over 14 tons loaded). The combination of these three factors, plus the steady torque of the diesels, makes for a dramatically different experience aboard in a variety of conditions. On a 420DA, there is no real sensation of "coming on plane". You simply advance the throttles until you achieve desired cruise RPM. There is a pronounced acceleration kick at 1800 RPMs when the turbochargers wind up; but there is negligible bow rise. I never use my tabs, unless I need to trim port and starboard, or lower the bow in sloppy conditions. I've run the boat in 3-4' and not bothered to slow down below 22 knots. In May of last year we elected to head about 35 miles downriver and spend the weekend. As the tide was going out, the wind kicked up to 30 knots sustained out of the south..so wind was against tide, which made for a pretty sloppy sea on the bow and starboard quarter. Several boats, including 26' to 35' Sea Rays from ourlocal dealer's marina, turned back on the same because of the conditions. I trimmed the bow down a bit to break the slop and maintained 23 knots all the way. I had to turn the windshield wipers on occasionally due to wind blown spray. My family fell asleep in the cockpit. A great riding boat.
    One issue I had with my 320 was bow rise coming on plane. I had to use the tabs, all the throttle I had, and stand up to maintain visibility forward. The 420DA requires none of that.
    Again, the 320 is a great boat, and my family and I had a wonderful time with ours. We just had an opportunity to pick up the used 420DA with Cummins power and are really, really glad that we made the move.
    regards
    Skip

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