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Gray Marine models "R" and "S" parts ...

Old Marine Engine » One and Two Cylinder Gas Inboards » Gray Marine models "R" and "S" parts list « Previous Next »

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frank_petran
Member
Username: frank_petran

Post Number: 27
Registered: 05-2009
Posted on Saturday, June 06, 2009 - 04:43 pm:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Moderator/Admin Only)

I just returned from a swap meet where I purchased an original repair parts and price list for a Model “U” and an original repair parts and price list for Models “R” and “S”. Models “R” and “S” is dated 1918 because it has a rubber stamped note dated Sept. 1, 1918 saying it was a list from 8 years ago and needed to have the price increased by 50%. Any-way. Most of the parts seem to be interchangeable between the two models with some exceptions. Does anyone know anything about this? According to the list the “R” model had a plunger type water pump and the model “S” has the rotary Oberdorfer pump type. Also does anyone know when the change from a solid flywheel to a spoked flywheel and on which models? The parts list show a solid flywheel.
Frank, mrwoodboat@wi.rr.com
Still looking for a flywheel for my 4.5 R Someone has to have one or has one on a froozen engine that they are willing to part with
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billschaller
Senior Member
Username: billschaller

Post Number: 273
Registered: 12-2003


Posted on Saturday, June 06, 2009 - 08:04 pm:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Moderator/Admin Only)

Every gray marine engine I have ever seen had a solid flywheel.
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frank_petran
Member
Username: frank_petran

Post Number: 30
Registered: 05-2009
Posted on Sunday, June 07, 2009 - 04:29 pm:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Moderator/Admin Only)

There is a picture of a Gray Marine Engine that is used as a stationary engine under the "Gray Motor Co. early 1 and 2 clyinders". Is that the same engine but with a governor and spoked flywheel.
Also, is the "S" engine and "R" engine the same except for carburators and waterpumps?
Frank
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billschaller
Senior Member
Username: billschaller

Post Number: 274
Registered: 12-2003


Posted on Sunday, June 07, 2009 - 05:39 pm:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Moderator/Admin Only)



this R stationary has a rotary pump. Otherwise, I bet the engine is the same, except for the flywheel, the governor, the cast iron base, gas tank, and the extended shaft. I am sure it needs a pulley, too. There may be something different with the thrust bearing, since it doesn't need one.

Here are two pictures of R Grays with rotary pumps. It probably was a difference in what year they were made as far as what pump they got.






Also, as far as I know many S models had a belt drive oil pump, like this. that is what that little shelf is for.



But that could be for early motors, before they knew about mixing oil.

Sorry if this is confusing, but that is what makes the research so much fun. next time you are in Red Wing, look me up.
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frank_petran
Advanced Member
Username: frank_petran

Post Number: 31
Registered: 05-2009
Posted on Sunday, June 07, 2009 - 09:20 pm:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Moderator/Admin Only)

Every engine has a thrust bearing according to the parts list. It is an integral part of the output shaft housing. I also noticed something, According to the parts list there are 2 different crankshafts, one tapered and one straight along with two different flywheels to match. In order to accommodate the inner and outer counterbalances the flywheel almost has to be spoked. Also where would the Starting Ratchet and Starting Plug fit on the engine? Is it possible that the number “1” in front of my engine model designate a tapered shaft as I've read several notes in which the model number was proceeded by a "1". Just a thought as the requirement to have the Company send parts or repair the engine a complete model number along with serial. Also, if someone wishes a photocopy of the repair parts and price list email me directly. This is a 20 page booklet that I enlarged to fit a letter sized paper sheet for clarity. My eyes just arn't a good as they used to be. I haven't enlarged the "U" model as yet but it doesn't have as many pages.

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