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GRAY Model U timing

Old Marine Engine » Gray Motor Co - early 1 and 2 cylinder » GRAY Model U timing « Previous Next »

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Tom G.
New member
Username: tomfg

Post Number: 2
Registered: 01-2013
Posted on Saturday, January 26, 2013 - 11:00 am:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Moderator/Admin Only)

There were several markings on my GRAY Model U's timer gears, punch marks, file marks, etc, none corresponding to the piston being on TDC. Therefore, when I put it together yesterday, with the piston on TDC, I set the gears so the timer contacts were centered / grounded. Is this correct?
Also, I need to build a test stand with a gas tank, buzz coil, battery, and coolant tank.
Any suggestions or photos of one? Would the coolant tank work best if it's above the water pump inlet, or do they prime okay if they are lower? Thanks, Tom
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Ernie
Senior Member
Username: ernie

Post Number: 1607
Registered: 01-2002


Posted on Saturday, January 26, 2013 - 07:02 pm:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Moderator/Admin Only)

Correct
I never even look for timing marks. I just put it at TDC (the flywheel key will either be straight up or straight down) then center the timer handle and set the contacts as you did.
Hope this helps
Ernie
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Tom G.
New member
Username: tomfg

Post Number: 3
Registered: 01-2013
Posted on Sunday, January 27, 2013 - 09:59 am:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Moderator/Admin Only)

Thanks for the reply Ernie. Am working on a Model T buzz coil now, so hopefully will have an ignition system soon. Still need to come up with a fuel and coolant tank.
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miro forest
Senior Member
Username: miro

Post Number: 656
Registered: 11-2001


Posted on Wednesday, January 30, 2013 - 06:00 pm:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Moderator/Admin Only)

Most folks at shows run a small barrel with the water level above the water pump - that way there will be circulation once the pump gets primed. Assuming the water pump is in OK shape, there is usually no problem getting it primed, after all it has to suck the water up when it is in a boat.

But the fuel tank MUST be above the carb - the vast majority antique marine engines are gravity fed.

It doesn't need to be high up - 8 - 10 in will do.

The fuel tank mounting should be "robust" because the engine will typical shake quite a bit at idle speeds used at shows.

In a boat, there was usually a short ( 1-2 ft ) length of rubber hose to isolate the engine fuel line that comes from the fuel tank.

Have a look at some of the pictures from the Calvert shows on this Discussion Board and you'll get some ideas that ought to work for you.

miro
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miro forest
Senior Member
Username: miro

Post Number: 657
Registered: 11-2001


Posted on Wednesday, January 30, 2013 - 06:16 pm:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Moderator/Admin Only)

Tom - if you are going for an easy to start engine, I'd recommend that you make yourself a modern buzz coil - I can send you the diagram - it's easier than getting a Model T coil to make a good hot spark.

It's been used by many of the folks on this web site.

miro
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Tom G.
Member
Username: tomfg

Post Number: 4
Registered: 01-2013
Posted on Wednesday, January 30, 2013 - 06:44 pm:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Moderator/Admin Only)

Miro, Thanks for your reply and input. I was rigging up an old lawnmower gas tank today, and wired up the Model T buzz coil. Tomorrow I'll be turning an old galvanized bucket and a tin funnel into a coolant tank. The mount for my gas tank is screwed to the engine skids, so it may vibrate like the dickens, but hopefully will be good enough for a test run. I've never heard it run before, so I'm anxious. Just remember, that I have no muffler yet :-(
I'd be interested in your plans for the homemade buzz coil. I'm always looking for a fun project.
Thanks, Tom
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Bob Power
New member
Username: bobstuff

Post Number: 3
Registered: 12-2012
Posted on Wednesday, January 30, 2013 - 07:35 pm:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Moderator/Admin Only)

Miro,
I'm working on a Gray model U also. Could you please send me the diagram to make a buzz coil?
Thanks
Bob
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miro forest
Senior Member
Username: miro

Post Number: 659
Registered: 11-2001


Posted on Wednesday, January 30, 2013 - 09:13 pm:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Moderator/Admin Only)

Sent to both of you via email.
Tom see if you can triangulate your temporary set up for your gas tank - inevitably it will be more permanant than you think or would like.
Miro

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