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Random Quote: Once you go Cat you'll never go back (Eliot - nana's couch 2 GB2670)
Anyone know of a successful engine transplant on an old model 60' Hatteras? I like the older 60' Hatteras's more; I like the lines, plus they are overbuilt and nearly a foot wider than the new 60' hatteras's. They are all equipped with 12V71 DD engines. I am a MAN engine guy. I want to replace the aging Detroit's with either V12 MAN 1360's or V12 MAN 1550's. The engine room on the 60' Hat is more than adequate, I have heard of one successful transplant on a 60' Hatteras w/ Cat 3412's (bigger, bulkier) so I'm sure it can be done...
I am aware of hull speed, and how that is limiting on older Hats. I don't expect 40 knots, but can a comfortable 24-25 knot cruise and a 30 knot max be attained with either 1360 or 1550 hp MAN engines on an older 60' Hatteras?
RE: Repowering a series I (1978-1986) 60' Hatteras...
Quote:
Moby1 - 10/21/2008 10:47 PM
You might want to try posting this question on boatdiesel.com. There are a couple of Man dealers that post there regularly.
They want money to join... A MAN mechanic would only have limited info on an engine transplant that (to my knowledge) has never been performed. Maybe consulting someone knowledgable from Hatteras who has been around for 20 years might know...
Re: Repowering a series I (1978-1986) 60' Hatteras...
There were repower pictures from one of the guys at Saunders yachtworks in Orange beach, Al on this site under boating pictures (I believe). Contact Saunders they did this about a year ago. Cut a big hole in the side and replaced the engines, very cool thread.
Re: Repowering a series I (1978-1986) 60' Hatteras...
I own a series I 60 Hatt, with 1000 horse 12v71ti's. Fast cruise is 20 knots, WOT 25. There's another series I on the next dock with 16v92's that cruises at 23 knots with top speed of 27, and I've heard of big Cats being installed.
If $$$$ were no object, I'd have C-32 Cats.
That being said, if you want a really fast boat, look elsewhere. You won't find a more seaworthy or nicer riding hull than this one, due to the weight and draft, but that works against you if speed is your goal.
Quality wise you can't beat a Hatteras, and the resale value reflects this perception. They're confortable, well built, solid as a rock and long lived, and very safe offshore, just not very fast.
BUT....only nitwits run fast when far offshore, especially at night, where 10 knots is the sensible speed limit, and range concerns mandate slow speeds anyway.
Re: Repowering a series I (1978-1986) 60' Hatteras...
Quote:
LUCKY DAVE - 10/22/2008 1:19 PM
I own a series I 60 Hatt, with 1000 horse 12v71ti's. Fast cruise is 20 knots, WOT 25. There's another series I on the next dock with 16v92's that cruises at 23 knots with top speed of 27, and I've heard of big Cats being installed.
If $$$$ were no object, I'd have C-32 Cats.
That being said, if you want a really fast boat, look elsewhere. You won't find a more seaworthy or nicer riding hull than this one, due to the weight and draft, but that works against you if speed is your goal.
Quality wise you can't beat a Hatteras, and the resale value reflects this perception. They're confortable, well built, solid as a rock and long lived, and very safe offshore, just not very fast.
BUT....only nitwits run fast when far offshore, especially at night, where 10 knots is the sensible speed limit, and range concerns mandate slow speeds anyway.
I looked at some MANs last week up in Pompano Beach. I looked at the 1360 hp V12 and the 1550 hp V12, the two biggest motors MAN currently makes. I wonder if either of these two motors would give me a 24-25 knot cruise and a 30 knot top speed...
Re: Repowering a series I (1978-1986) 60' Hatteras...
I would try talking to someone at either Allied Marine or Cable in Ft. Lauderdale. They both used to do extensions and other modifications to alot of Hats.
Also, I would stop by the engine tent at the Fort Lauderdale Boat Show and talk to the manufacturers. I know a guy that runs a charter out of Ponce Inlet that repowered an older Hatteras sportfisherman with the John Deere engines. He had his boat in Lauderdale for the show and was working with Deere on demos. I know he is real pleased with his switch.
I know of a 60 hatt 1981 i believe that was repowered with twin yanmar 8sy 900 hp per side. I know the owner is happy with the boat and I think they got 28kts top end and cruise at about 23 , 24. this was with spray rails added along the chine for the entire length of the boat.
12V92 JT's are 1150 HP, I think the 16V92 non DDEC is 1450? That should give a good indication of peformance based on the 16V92 equipped Hat above.
The above 1988 Hat has "Twin GM 12V92 TAC 1042 hp high performance engines" rated at 1042 HP each. What does the acronym "TAC" represent? The term "high performance" scares me, as DD's are not designed to be messed with aftermarket, unless you are asking for trouble. I don't know where you got the 16V92's from.
Quote:
Originally Posted by ocean 38
I know of a 60 hatt 1981 i believe that was repowered with twin yanmar 8sy 900 hp per side. I know the owner is happy with the boat and I think they got 28kts top end and cruise at about 23 , 24. this was with spray rails added along the chine for the entire length of the boat.
good luck '
Greg
I find that hard to believe, as later 60' Hats were equipped with 850 hp 12-71's (as opposed to the earlier 650 hp 71's) and the cruise speed increased from 17 knots to only 19-20 knots (@ 1950 RPM). I doubt an extra 50 hp would produce a 23-24 knot cruise.
The above 1988 Hat has "Twin GM 12V92 TAC 1042 hp high performance engines" rated at 1042 HP each. What does the acronym "TAC" represent? The term "high performance" scares me, as DD's are not designed to be messed with aftermarket, unless you are asking for trouble. I don't know where you got the 16V92's from.
I find that hard to believe, as later 60' Hats were equipped with 850 hp 12-71's (as opposed to the earlier 650 hp 71's) and the cruise speed increased from 17 knots to only 19-20 knots (@ 1950 RPM). I doubt an extra 50 hp would produce a 23-24 knot cruise.
Turbo After Cooled. I was speaking of the Hat mentioned as a Dockmate to another in the 7th post.. The 16V92 Makes big power, doesnt last long, but big power. Think about this, an 8V92 that makes 440 HP will make about 1100 pounds feet of torque or more. A 16V92 DDEC is making around 3000 plus pounds feet of torque. There is some lunatic out there with a 16V making 4500 HP for Landspeed record attempts.
Turbo After Cooled. I was speaking of the Hat mentioned as a Dockmate to another in the 7th post.. The 16V92 Makes big power, doesnt last long, but big power. Think about this, an 8V92 that makes 440 HP will make about 1100 pounds feet of torque or more. A 16V92 DDEC is making around 3000 plus pounds feet of torque. There is some lunatic out there with a 16V making 4500 HP for Landspeed record attempts.
The above 1988 Hat has "Twin GM 12V92 TAC 1042 hp high performance engines" rated at 1042 HP each. What does the acronym "TAC" represent? The term "high performance" scares me, as DD's are not designed to be messed with aftermarket, unless you are asking for trouble. I don't know where you got the 16V92's from.
I find that hard to believe, as later 60' Hats were equipped with 850 hp 12-71's (as opposed to the earlier 650 hp 71's) and the cruise speed increased from 17 knots to only 19-20 knots (@ 1950 RPM). I doubt an extra 50 hp would produce a 23-24 knot cruise.
yes but think about the weight difference between the 8sys yanmars and the 12v71 detroits. here are the weight s of the 12v71 detroit in this chart it says the 12v71Ti weighs 5200 lbs per engine
therefore that is at least a savings of 2000 lbs total and like I said the particular boat was fitted with a chine extension for its entire length, which also helped to increase the speed
therefore that is at least a savings of 2000 lbs total and like I said the particular boat was fitted with a chine extension for its entire length, which also helped to increase the speed
greg
Thats quite an engine. My only question would be what Yanmar can offer in terms of warranties and service. I know they are popular in the small engine market, but I wonder how well their distributors could handle such a large engine. Also, for an 80,000 lb boat, I wonder if such a beast would notice 2,000 lbs less weight in the engine room...
I would strongly suggest the 3412/C-32 CAT engine for that boat. That's a big heavy boat that needs big, powerful, high torque, long-lived motors.... go for big CAT power. The MAN (and especially the Yanmar) doesn't make sense to me in that beast. Good luck.
As a kid I grew up going fishing with my Uncle Bob on the Hatteras's he owned. They are beautiful boats. The last one he had was a 1988 or 1989 65 foot convertible. I remember it was powered with MTU's. The boat was called "Bobs Retreat".
That boat was a blast to be on. I remember feeling like I was Hot Sh!t on the bridge of that thing going out the Fort Pierce Inlet. On the bow there was a small Novamarine with a Yamaha outboard and two Yamaha waverunners painted to match the Hatteras. We allways had a blast with those at family functions. He sold it around the end of 1993 when his health was deteriating. I have looked at numerous 65's for sale and have not found one that looks remotely like his on the interior. I would love to know where that boat is now.
Repowering a series I (1978-1986) 60' Hatteras... 
