So now we know. Thanks, Ken.
Dennis C.
>________________________________
> From: Ken Heaton <kenhea...@gmail.com>
>To: j...@dellabarba.com; cnc-list <cnc-list@cnc-list.com>
>Sent: Sunday, February 2, 2014 10:37 AM
>Subject: Re: Stus-List Atomic 4
>
>
>
>This information seems to come and go on the web so I thought I'd put it in an
>email on Stu's list for reference. I found it in a couple of places, this is
>one place: http://www.shadowmagic3d.com/BlackSwan/5uh.html
>
>
>This is another:
>http://www.oldmarineengine.com/discus/messages/3449/262687.html
>
>
>The Atomic Four
>
>
>In 1947 the Atomic Four was introduced. It was a 4 cylinder inline / 1 litre
>(64.46 cu. in.) / 30 hp engine, Model UJ - 5101 (direct drive) / UJR - 5102
>(2:1 reduction gear) / UJVD - 5103 (V drive, 1:1, 1.29:1, 1.67:1, 2:1
>reduction gear options) L head (flat head) engine incorporating an integral
>reverse gear, with roots stretching back to the earliest Universal 4 cylinder
>engines. It was not a modified Jeep or Farmall tractor engine (the early
>military and civilian Jeep engine was a 4 cylinder, L head design like the
>Atomic Four, but it was twice the size of the Atomic Four at 2.2 litres (134
>cu. in.) and had 3 main bearings - the Atomic Four has 2. In 1953 Jeep
>switched to an F head engine) and if anything was based on the successful
>Utility Four life boat engine. Sales of the Atomic Four grew strongly after
>1955 as the recreational sailboat market expanded.
>
>
>All Atomic Four engines were fitted with Paragon marine reverse gears, and
>were also available with an optional Paragon reduction gear assembly or Walter
>V drive assembly mounted on the end of the reverse gear. Paragon reverse gears
>and reduction drives were built at the Paragon Gear Works factory in Taunton,
>Massachusetts. Walter V drives were built by the Walter Machine Company in
>Jersey City, New Jersey. They were available in several different ratios. When
>a reduction drive or V drive is fitted the Paragon reverse gear requires a
>different final output drive shaft than the one fitted to direct drive model.
>
>
>The Walter V drive has a V angle of 22 degrees, which means it is hard to
>replace a V drive Atomic Four with a Kubota or Yanmar based V drive diesel
>engine because most common V drives sold with diesels (ie Hurth) have a V
>angle of 15 degrees. The difference in V angle necessitates extensive
>modification of engine mounts, stern tube, and rear propeller shaft support
>strut in order to mount the new engine at the correct angle.
>
>
>Most Universal engine parts were cast in-house at the Universal Foundry
>building near the factory, which was torn down in 2000. Engine parts cast at
>the foundry are marked with the cast-in foundry mark "UF" (for "Universal
>Foundry") as well as a cast-in engine code and part mould number (ie the
>Atomic Four engine code is "UJ", and the Atomic Four cylinder head mould
>number is "2"... so Atomic Four cylinder heads have a cast-in "UJ-2".
>
>
>Universal used a Prestolite distributor, coil, generator, regulator, and
>starter on the Atomic Four until 1967 (initially 6 volt and later 12 volt),
>and in 1968 began using 12 volt Delco Remy ignition / starter components and
>Motorola alternator on the upgraded version released that year. The Prestolite
>starter has a different bendix gear / ring gear tooth pitch than the Delco
>starter bendix gear / ring gear, which means that the newer Delco starter
>cannot be fitted without also changing the ring gear. The Delco ring gear
>diameter is .5" wider than the Prestolite part, and so the flywheel housing
>casting must also be changed or machined to accommodate the larger Delco ring
>gear.
>
>
>The new version had a new cylinder head design which incorporated a full flow
>bypass thermostat housing, a modified lubrication system, and upgraded valves
>/ valve followers / valve springs. Many minor design changes were made to the
>Atomic Four over the 37 years it was in production.
>
>
>A special Canadian version of the Atomic Four was produced for several years
>starting in 1975?. Called the Stevedore (Model UJS - 5111 (direct drive),
>Model UJSR - 5112 (reduction drive), Model UJVD - 5113 (V drive), it was
>exactly the same as an Atomic Four except it had a restrictor in the intake
>manifold which limited maximum power to 13.8 kW / 18.5 hp at 3,000 rpm, and
>different carburettor jets. The Stevedore was intended to comply with a
>Canadian federal or provincial regulation (possibly the province of Ontario,
>where the Canadian sail boat industry was centred) regarding maximum
>horsepower, or to gain a tax, insurance, or import duty advantage. The Atomic
>Four produces 22.3 kW / 30 hp at 3,500 rpm, however the Atomic Four and the
>Stevedore produce nearly identical power (approximately 11 kW / 15 hp) at a
>typical sailboat engine maximum speed of 2,000 rpm.
>
>
>The price of a new Atomic Four in 1976 was $1,970.00USD FOB Oshkosh,
>Wisconsin. Approximately 40,000 Atomic Four engines were sold between 1947 and
>1984, with an estimated 20,000 still in use in 1998. Paint colours available
>for the Atomic Four in 1960 were listed in the parts manual as green,
>aqua-blue, epoxy tan, and copper metallic, but by 1970 the only colour
>available for the Atomic Four was copper metallic, which was the colour most
>engines were painted.
>
>
>From 1965 to 1975 Universal had about 80% of the sailboat market. Universal
>engines, nearly all Atomic Fours, were fitted to sailboats from 7.6 metres /
>25 feet to 12 metres / 41 feet.
>
>
>
>In the early 1970’s sailboat manufacturers began fitting Yanmar diesel
>auxiliaries instead of the Atomic Four gasoline auxiliary, however Atomic Four
>sales continued to grow until their peak year of 1975. In 1976, as sales of
>the Atomic Four started to drop, Universal met the challenge from Yanmar by
>buying Kubota diesel engines and selling marinized versions, under the name
>Universal. Atomic Four sales gradually declined as manufacturers increasingly
>used diesel engines, and manufacturing ceased in 1980, with sales continuing
>until all units were sold in 1984. The last OEM (original equipment
>manufacturer) to fit the Atomic Four was Catalina, who used it up until the
>1985 Catalina model year. After 1985 Universal sold only diesel marine
>engines, which were fitted by several OEM, including Catalina.
>
>
>
>On 2 February 2014 12:14, Joe Della Barba <j...@dellabarba.com> wrote:
>
>The Farmall engine does not have a common bore and stroke with the A4, so the
>pistons and rings would not work. Likewise the connecting rods. I have also
>had people *swear* the A4 is an old Jeep engine or has many common parts with
>one when the Jeep engine is utterly unrelated.
>>
>>Joe Della Barba
>>Coquina
>>C&C 35 MK I
>>From:CnC-List [mailto:cnc-list-boun...@cnc-list.com] On Behalf Of jtsails
>>Sent: Saturday, February 01, 2014 4:37 PM
>>
>>To: cnc-list@cnc-list.com
>>Subject: Re: Stus-List Atomic 4
>>
>>Not too sure about this. While I agree that the A4 was never used in a
>>tractor, the farmall engines do have a lot of common parts with the A4. If
>>memory servers me right (and this comes from way,way back) the pistons,
>>rings, connecting rods and bearings were all shared with both designs. I know
>>we used a lot of those parts when we rebuilt one in the mid 80s, the dark
>>ages. I don't want anybody to buy parts based on my memory, so please check
>>the specs!
>>James
>>S/V Delaney
>>1976 C&C 38
>>Oriental, NC
>>----- Original Message -----
>>>From:Della Barba, Joe
>>>To:Dennis C. ; cnc-list@cnc-list.com
>>>Sent:Friday, January 31, 2014 11:28 AM
>>>Subject:Re: Stus-List Atomic 4
>>>
>>>????
>>>The A4 has no common parts with a tractor with one exception. There is a
>>>“land” version of the carb that can be found for cheap and was used on a lot
>>>of industrial equipment. It is quite dangerous on a boat because instead of
>>>a scavenging tube to suck extra fuel back into the engine, it has a drain to
>>>let it run out of the bottom of the carb.
>>>
>>>Joe Della Barba
>>>Coquina C&C 35 MK I
>>>
>>>From:CnC-List [mailto:cnc-list-boun...@cnc-list.com] On Behalf Of Dennis C.
>>>Sent: Friday, January 31, 2014 11:15 AM
>>>To: cnc-list@cnc-list.com
>>>Subject: Re: Stus-List Atomic 4
>>>
>>>And there may be parts and support here: http://www.farmallcub.com/dcms/
>>>
>>>Dennis C.
>>>Touche' 35-1 #83
>>>Mandeville, LA
>>>
>>>
>>>>________________________________
>>>>
>>>>From:"Della Barba, Joe" <joe.della.ba...@ssa.gov>
>>>>To: "cnc-list@cnc-list.com" <cnc-list@cnc-list.com>
>>>>Sent: Friday, January 31, 2014 10:06 AM
>>>>Subject: Re: Stus-List Atomic 4
>>>>
>>>>One more thing for A4 or potential A4 owners:
>>>>The A4 has kind of turned into an “open source” project. You can now build
>>>>an A4 that is vastly better than the original stock engine. Moyer Marine
>>>>(http://www.moyermarine.com) and Indigo (www.atomic4.com) have any number
>>>>of modifications and accessories that did not exist years ago. The A4 is
>>>>arguably much better supported now than it was 20 years ago. There was kind
>>>>of a “dark age” of A4s where Universal quit making them, the aftermarket
>>>>was not yet mature, and most shops would do a ½-A55 job of fixing them at
>>>>best and tell you to buy a new diesel.
>>>>
>>>>Joe Della Barba
>>>>Coquina
>>>>C&C 35 MK I
>>>>
>>>>_______________________________________________
>>>>This List is provided by the C&C Photo Album
>>>>http://www.cncphotoalbum.com
>>>>CnC-List@cnc-list.com
>>>>
>>>
>>>________________________________
>>>
>>>_______________________________________________
>>>This List is provided by the C&C Photo Album
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>>_______________________________________________
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>>
>>
>
>
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