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St-Lawrence marine engine

Old Marine Engine » One and Two Cylinder Gas Inboards » St-Lawrence marine engine « Previous Next »

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roger legault
Visitor
Posted on Tuesday, June 14, 2005 - 08:47 pm:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Moderator/Admin Only)

Hi,
I just bought my first marine engine. I curently restore stationnary farm engines. This engine is a two cylinder St-Lawrence serial #723. It has brass connecting rods and a gear type water pump. What is the MFG date of this engine and where could I get parts (crank case covers, drain cocks, float for the schebler carburator, oilers) to restore it. The oilers were removed and the oil entrance to the crankcase pluged. I guess it was run with a mixture of oil and gas. Was that common ??

Thanks
Roger Legault
Mirabel, QC
Canada
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miro
Senior Member
Username: miro

Post Number: 179
Registered: 11-2001
Posted on Wednesday, June 15, 2005 - 02:03 pm:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Moderator/Admin Only)

You can try Paul Dodington 705-765-5037 to see if he has the parts you need. He is in Port Carling, Ontario. He has the stock of parts mainly to re-build engines for DisPro boats.
You must always run the engine with oil in the gas nothing else really works as well. You can mount the oilers if you get them, but they are just for show.

miro
miro
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richardday
Senior Member
Username: richardday

Post Number: 417
Registered: 11-2003


Posted on Wednesday, June 15, 2005 - 08:04 pm:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Moderator/Admin Only)

Run 40:1 Mixure. Use SAE 30 nondetergent motor oil. Pint to five gallons. You can get good replacement floats from Dave Reed at OTTO@dol.net.
They are modern plastic and work better than the originals. Take a look at Tips on the OME page as it will warn you what you are getting into. These are not farm style engines and while they are two strokes they are not chain saws and weed whackers.
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andrew
Moderator
Username: andrew

Post Number: 1156
Registered: 11-2001


Posted on Thursday, June 16, 2005 - 05:52 pm:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Moderator/Admin Only)

Roger,

For some good info on marine engines you might want OLD MARINE ENGINES and THE PALMER HANDBOOK.
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Foxman
Visitor
Posted on Tuesday, July 26, 2005 - 08:46 am:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Moderator/Admin Only)

The manufacture date of the engine would be about 1911 or 1912. The serial numbers on the engine plate did not appear until 1910 and were (i think) numbered from 500 on. In the heyday 1908-1915, StL produced about 200-300 engines a year-all hand built.
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abm
Member
Username: abm

Post Number: 16
Registered: 08-2004


Posted on Sunday, May 07, 2006 - 05:07 pm:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Moderator/Admin Only)

Hi all. I have a 2 cylinder St. Lawrence, serial number 758 in my L.E. Fry long deck launch. The engine has a fly wheel with a gear ring that certainly appears to be original. The previous owner has fitted a very usefull 12V electric starter. However, I am convinced the original had a dash crank. There is even a cutout in the dash that would seem to support that supposition. I wonder, does anyone have a St. Lawrence with dash crank that I could look at, get some photos and dimensions and then recreate the modern original? Thanks for your help.
Dave Richardson
dave@syoverstreet.com
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James Clark
Visitor
Posted on Wednesday, June 30, 2010 - 03:37 pm:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Moderator/Admin Only)

St. Lawrence Engines were built in my home town of Brockville until the early 1950's. The company then changed owners and became an Evenrude dealer and General Machine Shop. They also made conversions of Ford "T", "A" & "V-8" engines and at least one Ford Prefect.
I had at various times Serial 612 (1912), 7045 (1940), 6212 (Model"A") and 7835 (V-8).

Use 1pt/5 gallon (1 liter/40 liters) of non dertergent #30 oil for a gas fuel mixture. Use a hard grease on the mains as it seals the crankcase as well as lubricating. If you can't get "GALENA" railway grease use water pump grease. Engines using a dash crank had a sprocket and a chain drive on the flywheel end.

Geared flywheels were a post WWII modification for dispros and used the starter from a Ford V8

It is difficult to date these engines from serial number as a block of numbers was assigned to each model. Post WWII production had plates with model number and a sequncial serial number.

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