| Author |
Message |
    
mikewwww
New member
Username: mikewwww
Post Number: 1
Registered: 03-2013
| | Posted on Sunday, March 10, 2013 - 02:50 pm: | 
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Would any one know the approximate year of this engine? Unfortunately the serial number tag is missing. Flywheel is 2" thick & 14" in diameter.
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richarddurgee
Senior Member
Username: richarddurgee
Post Number: 2989
Registered: 11-2001
| | Posted on Sunday, March 10, 2013 - 05:10 pm: |
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*
The one piece exhaust/intake manifolds were mfgrd
after WWI from about 1920, the early type Waterpump was used through the 6500 serial numbered engs about 1935 !
Nice old Twin !!
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mikewwww
New member
Username: mikewwww
Post Number: 2
Registered: 03-2013
| | Posted on Sunday, March 10, 2013 - 05:18 pm: |
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Thanks for the input. So that does that mean it would be between 1920 & 1935. Would there be a serial number anywhere else on this motor? |
mikewwww
New member
Username: mikewwww
Post Number: 3
Registered: 03-2013
| | Posted on Sunday, March 10, 2013 - 05:40 pm: |
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What does the vertical shaft geared to the flywheel do? |
bruce
Senior Member
Username: bruce
Post Number: 366
Registered: 07-2002
| | Posted on Sunday, March 10, 2013 - 10:43 pm: |
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Drives the ignition timer... |
rogerd
Member
Username: rogerd
Post Number: 12
Registered: 01-2010
| | Posted on Monday, March 11, 2013 - 11:03 am: |
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The machined end of the crankcase looks like the place where the timer strap goes on a single and a twin that I have owned--Not an expert. |
jb_castagnos
Senior Member
Username: jb_castagnos
Post Number: 774
Registered: 07-2002
| | Posted on Monday, March 11, 2013 - 08:44 pm: |
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This is the first I've seen with a front shaft driven timer, the others I've seen have been rear timers with a gear pump. |
bcm
Advanced Member
Username: bcm
Post Number: 45
Registered: 11-2009
| | Posted on Tuesday, March 12, 2013 - 10:33 am: |
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This may not be an original factory installed timer.
When crankshaft bearing is worn,grease tends to deposit on timer commutator, ignition is interrupted and unreliable.
Using the bevel gear timer drive would eliminate this problem.
Looks like a check valve is installed at carburetor. This is also a sign of leaking/worn main bearings as check valve is not original equipment
Many St Lawrence engines users have now converted to the electronic , non contact timer.
http://www.oldmarineengine.com/discus/messages/3457/96400.html
This eliminates the grease problem.
I date this engine about 1934 if pistons are aluminum. These 3 1/4B x 3 1/2S twins were often seen south of Ottawa on the Rideau, |
boatgirlii
New member
Username: boatgirlii
Post Number: 2
Registered: 02-2013
| | Posted on Sunday, November 03, 2013 - 11:33 pm: |
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I own a 30 ft. 1935 cruiser and would like to repower her with an original engine. the registration states her original engine was gasoline of 87 bhp. she was built in Victoria b.c.she was repowered in the 1950,s with a BMC unit. Does anyone have a good guess what the original might have been? Vivian? thanks Boatgirl |
