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Calling all Stuart Owners

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steve
Member
Username: skankin_giant

Post Number: 16
Registered: 03-2010
Posted on Tuesday, December 27, 2011 - 02:46 pm:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Moderator/Admin Only)

Hello,

I decided to set myself a bit of a challenge!
I’m going to attempt to make a Catalogue of variations in Stuart Turner engines.
So am going to create a database of engines, holding information like, Model, Prefix, Serial Number, HP RPM, Carburettor Fitted, Magneto... etc, would also like to get pictures to into the database for comparison between different variations.

I Shall be starting on the production engines and possibly working towards cast kits (W2/4) and open cranks.

If anyone would like to send in details of there engine please contact me, with as much info as you can on your engine, a picture would also be great.

I think I have Flat Twins covered.

Should keep me quite for a few years :D

Cheers Steve
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steve
Member
Username: skankin_giant

Post Number: 18
Registered: 03-2010
Posted on Monday, February 13, 2012 - 03:45 pm:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Moderator/Admin Only)

Making a little head way with this!


Stuart Turners

Pre P3

Unsure of model designation of the Pre P3 engine, these were simple 2 port 2 strokes with a atmospheric valve in the intake very similar to Mr Joseph Day’s orginal design. Supplied in either gas form with hot tube and spark ignition available or petrol form with spark ignition, the gas version had a single drip oiler supplying the main bearing, the crack shaft has a oil channel to draw the oil into the crank case to oil the insides, the petrol version seems to have been fitted with 2 drip oilers, one feeding the main bearings as in the gas version and the other linked the carburettor for Petroil lubrication, the petrol version was also fitted with a float chamber, it is unclear when these were introduced, though I believe while designing they were still under the restraints applied by the patient taken out on the Day and Cock 3 port 2 stroke which didn’t end until 1907, but I can find no information to back this, production stopped with the out break of the 1st World War.

HP- 1/2hp
RPM -
Magnetos used –
Carburettors used – Stuart Turner own design, with float chamber for petrol models.

P3

The P3 was introduced after the 1st World War in 1918/1919, designed by Mr Plint, The P3 was Stuarts 1st 3 port 2 stroke, which holds true to Mr Cock’s design patented on his behalf by Mr Joseph Day, few believe that the 3 in P3 either indicates its Stuarts 1st 3 port engine or that the P3 was Mr Plint’s 3rd Design, but I have been unable to find any fact to this.

P3 – As far as I can tell there was not Suffix letters on the P3 range of engine, there were a couple of special application engines made, I have also seen one very strange engine,

HP- 1 1/2hp
RPM - 1000RPM
Magnetos used –
Carburettors used – Stuart Turner



WD? (Flat Twin)

The Stuart Turner Flat twin came into existence when the War Office approached Stuart Turner as 7 other companies in 1923 for a light weight generator set that could be carried into forward operating positions on the back of pack mules, the War Office set stringent criteria that needed to be fulfilled, Stuart Tuner was asked to build 2 engine for trials.
The engine that was produce was the only engine to perform as needed while adhering to the criteria.
The engine Stuart Turner designed and entered was a Small Flat Twin Side Valve air cooled four stroke supplied with 300 Watt generator, oil pump fitted so that the engine would no be affected by which position it was carried, and was extremely light weight.
The engine was referred to as the WD in A Short History by H. Sanderson.

HP- 1hp
RPM -
Magnetos used – BTH
Carburettors used – Stuart Turner



P4

The P4 Superseded the P3 in 1928, fitted with main and big end roller bearings and chain drive magneto.

Y – Generator sets, hydrosyphon cooling either via tank or radiator

HP- 1 1/2hp
RPM - 1000RPM
Magnetos used – Lucas N1, Wico A, Lucas SR1
Carburettors used – Stuart Turner


Type N

Introduced as new entry level engine 1/2hp @ 1300RPM, thought to be introduced 1932 though an N1 features in the 1930 catalogue, so there is a little conservers to when this engine was introduced.

HP- 1/2hp
RPM - 1300RPM
Magnetos used – BTH
Carburettors used – Stuart Turner


N1 – Ungoverned generator set engine throttle controlled via turning the air cap, slim flywheel

N2 – Governed generator set, throttle adjusted via slide as per later ST carbs, slim flywheel

N3 – marine version, fitted with a shaft drive magneto, diaphragm water pump and a fatter flywheel to the N1 or 2.

N4 - Governed generator set, throttle adjusted via slide as per later ST carbs, slim flywheel, fitted with a diaphragm water pump.


P5

Initially the P5 was an uprated version P4, designed for harder working, the early industrial and marine units are virtually identical to the P4, The early units can be disguised by their 4 Bolt Head and separate cast expansion chamber

HP- 3hp
RPM - 1500RPM
Magnetos used – Lucas N1, Lucas SR1
Carburettors used – Stuart Turner

Y – Same as P4

LY – Pump cooled, same pump as fitted to R3, also fitted with Best and Lloyds oil pump

M? – There is also a few early P5M’s which bare a resemblance to the P4/5 industrial engine, having the 4 bolt head and cast expansion chamber, these are fitted with a marine gearbox. (Possibly the 50 engine ordered by Mr Neble: Mr. Neble, a Danish gentleman, came to see us. He told us he wanted a 3 b.h.p. engine for pleasure park boats, could not find one that was any good and would we provide him with 50 engines within four weeks? We took a deep breath and said “Yes”!)

MCR - This is a strange one, seems to be a early P5 fitted with a centrifugal clutch with a reduction gear intended for marine use, it is pump cooled as per the M designation.

The Later P5 was redesigned and uprated for marine purposes this engine can be identified by its 6 bolt head, water cooled exhaust and it is pump cooled using new design pump.

HP- 4hp
RPM - 1500RPM
Magnetos used – Lucas SR1
Carburettors used – Stuart Turner,Solex


M – Marine Engine, Forward and Reverse gearbox

MA - Higher RPM version of P5M 1650RPM

MC – Marine Engine fitted with Centrifugal clutch

MD – as per M fitted with Dynastart

ME – as per M fitted with Electric start

MR - Marine engine with Reduction Gear box reduced the speed the Prop spins at.

MRE - as P5MR with electric start


X/XC? – Marine engine adapted for industrial use, fitted with a Skinny flywheel to take the RPM up to 1800RPM, radiator cooled, some (if not all) fitted with a clutch, noted buyers Zwickys refulers.

R2/3

As far as I can tell the R2 type N as the low HP model in the range, and the R3 replacing the P4, the R2 and 3 are similar looking to the P5 Marine and cant see the trend in Stuart Turner switching to being a Marine supplier.
All marine units were pumped cooled using the Stuart Turner “banjo pump”

R2

HP- 1hp
RPM - 1400RPM
Magnetos used – Wico A, Lucas SR1, Wico Flywheel Magneto, Millier Flywheel Magneto
Carburettors used – Stuart Turner, Amal.

R3

HP- 1m 1/2hp
RPM - 1500RPM
Magnetos used – Wico A, Lucas SR1, Wico Flywheel Magneto, Millier Flywheel Magneto
Carburettors used – Stuart Turner, Amal


Pumper: (R2 only, no set suffix for R2 Pumper AFAIK) Pumping Set engine, Hopper/Tank cooled bolted to expansion chamber.

Industral

Y – More Data needed
LY – Same as P5LY

Marine

M – as per P5M

MC – as per P5C

MD – as per P5D

Unknown

C - There has been some engine seen with just a C as a suffix, these are fitted with a centrifugal clutch and look idental to the R3MC

P6

P6 – Uprated version of the redesigned P5, Marine Units only an attempt to extend the life of the range. 6 bolt head, water cooled exhaust, pump cooled using new design pump

HP- 5hp
RPM - 1650RPM
Magnetos used – Wico A, Lucas SR1
Carburettors used – Stuart Turner,Solex


M – As per P5

MC – As Per P5

C - Centrifugal Clutch

P55

The P55 is a twin cylinder version of the P5 Marine engine, all the marine units were pumped cooed with the same pump as fitted to P5, and there was also an industrial engine available which didn’t have the water pump fitted, there were mostly used for larger generator sets.

M - P55 Version of P5M

MA - P55 Version of P5MA

MR - P55 Version of P5MR

MRE - as P55MR with electric start

MRT - which is a P55MR fitted to Class B lifeboats it differs from the other P55MR’s as it had a fuel lift pump fitted and a large fuel tank.

Industrial Unit

HP- 8hp
RPM - 1500RPM
Magnetos used – BTH, Wico A, Lucas SR1
Carburettors used – Stuart Turner, Solex Amal

P66,

The P66 was an uprated P55, an attempt to extend the life of the range.

P66 – Twin Cylinder

HP- 10hp
RPM - 1650RPM
Magnetos used – Wico A, Lucas SR1
Carburettors used – Stuart Turner, Amal

K

Air cooled Vertical 4 stroke overhead valve, intend to be used as part of refrigeration units.

HP- 1 1/2hp? From an information board A-Z says otherwise
RPM -
Magnetos used – BTH
Carburettors used – Stuart Turner

H

The H range was ST dip into the diesel market, at the time these were the smallest high speed diesels on the market, but from what I can tell they were not very successful do to them being difficult to maintain.

H/HY - The H and HY were single-cylinder vertical two stroke high speed diesels with crankcase compression

HP- 3hp
RPM – 1500 RPM

H2 – Twin Cylinder Marine engine, Pressure Scavenged, fitted with forward and reverse gearbox.

HP- 9hp
RPM – 1500 RPM

M - Marine engine fitted with forward and reverse gearbox

Y – Industrial version for generator sets.

ST

The was ST was a 4 stroke, 12 hp petrol marine engine, Numbers 401 onwards had the 73
gearbox.

HP- 12hp
RPM - 1650
Magnetos used - Wipac - Impulse start (Coil Ingnition Engines used either
Lucas or Wipac coils)
Carburettors used - Solex Type 26NV
Dynastart - Siba type DS500 (mine has separate regualtor and starter solenoid
and is altogether a bigger unit than those fitted to P55s, 66s etc.
Fuel consumption - 58 mins per gallon (0.69pt/bhp/hour)


Cheers Steve
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Stafford Buck
Visitor
Posted on Wednesday, May 02, 2012 - 05:37 pm:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Moderator/Admin Only)

I have :- R2-33659, 1500RPM, R2 1769 on head, Stuart Base marked ADM PATT M863, Stuart Plant 33701,300 watts, RPM 1500,Volts 25/35,Dynamo 35E695, Switch Board 6053, Stuart Carburetter PAT.14607/19.
Any info. Much needed, Thanks, Stafford Buck.
staffordbuck@yahoo.co.uk
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Peter Winfindale
Visitor
Posted on Monday, May 21, 2012 - 12:35 pm:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Moderator/Admin Only)

Hi Steve,

I have ST 4 No. 421 (I think. Its in a boat and I'm remembering the number). Would you have any idea when it may have been built?

Regards,

Peter Winfindale
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steve
Member
Username: skankin_giant

Post Number: 20
Registered: 03-2010
Posted on Tuesday, June 05, 2012 - 05:34 am:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Moderator/Admin Only)

Hi Peter,
Had a rough calculation and put it about 1974, engine with the type 73 gear box only ran from 1973 - 1975, with 37 being built.

Cheers Steve
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David Pickett
New member
Username: dp34067

Post Number: 2
Registered: 04-2009
Posted on Wednesday, August 21, 2013 - 02:32 pm:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Moderator/Admin Only)

Hi, For your database of engines:- P5MR, engine No. 19486 installed in a 14ft clinker built motor dinghy, built by SE Saunders of East Cowes sometime before 1929 when this company merged with AV Roe.
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David H
Visitor
Posted on Wednesday, September 18, 2013 - 12:44 pm:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Moderator/Admin Only)

P55ME number 61B060 is an 8 HP at 1500 rpm reverse gear two cylinder two stroke fitted to an Ormelite 24.8 ft. boat.
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Sophie D
New member
Username: sophehoney

Post Number: 1
Registered: 08-2014
Posted on Saturday, August 09, 2014 - 10:09 am:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Moderator/Admin Only)

Hi Steve,
Have just purchased a 16' wooden launch restoration project with a Stuart Turner marine engine.
Details:
R3M 1.5HP, 1500 RPM, Engine number: 40R960.
Lucas SR Magneto, Model: SR1, Type: MK11 566?
Carburettor: AMAL LTD, Birmingham, England.

Any ideas on when it may have been manufactured and where I may be able to find a manual / specifications that will assist me in dismantling the engine ready for a rebuild?
Many thanks,
Sophie
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David Ewart Schofield
Visitor
Posted on Saturday, August 23, 2014 - 04:05 pm:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Moderator/Admin Only)

Hi Steve, I have a WD but is missing the carb any thoughts ? I also have a R3ME. Only 65 of these were built as the dyno-flywheel absorbed too much power so they were discontinued. I have lots of P5,s and R3M,s. All gaskets and spares are available from me.
Kind regards, David.

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