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Gray Marine 1 Cylinder 4 Cycle

Old Marine Engine » Gray Motor Co - early 1 and 2 cylinder » Gray Marine 1 Cylinder 4 Cycle « Previous Next »

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John Heasley
Posted on Wednesday, January 29, 2003 - 09:46 am:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Moderator/Admin Only)

I have a Gray one cylinder 4-cycle marine engine. I am going to restore this engine and looking for information such as literature, parts availability etc. The brass tag indicates Model # 1-5 & number 4192. Any information will be appreciated. Have pictures of engine & tag but can't figure out how to attache them to post.
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andrew
Posted on Wednesday, January 29, 2003 - 07:28 pm:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Moderator/Admin Only)

Here is a picture of John's engine.

gray
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andrew
Posted on Wednesday, January 29, 2003 - 07:34 pm:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Moderator/Admin Only)

John's engine's tag:

tag
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Bill Schaller
Posted on Thursday, January 30, 2003 - 03:13 am:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Moderator/Admin Only)

here is my gray model O
Text description
Text description
Text description
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rholcomb
Posted on Thursday, January 30, 2003 - 08:18 am:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Moderator/Admin Only)

There was a thread on the history of universal and gray a while back, look at the simularities of the e.k bracket bob...

bracket1
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Richard Day
Posted on Thursday, January 30, 2003 - 07:41 pm:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Moderator/Admin Only)

Why do I think I have seen the model I-5 as the same as Bridgeport and US Motors Ace OK???
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gray4cycle
Posted on Friday, January 31, 2003 - 09:05 am:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Moderator/Admin Only)

I have some catalog pictures that look just like this engine. The catalog is from U.S. Falcon. I think U.S. Falcon, U.S. Motors Corporation, Doman and Gray are somehow related. Someone told me that Gray didn't manufacture engines but purchased them & sold them under their name. Is this true?
John Heasley
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Ernie
Posted on Friday, January 31, 2003 - 09:38 am:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Moderator/Admin Only)

The Gray and Falcon engines are mirror images of eachother. Look close at the above pics. Additionally I have seen both a Gray and Falcon engines sitting side by side and they are identical, just opposite. Also there were many ignition differences/options as well as carbs.
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Richard Day
Posted on Friday, January 31, 2003 - 05:04 pm:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Moderator/Admin Only)

Well how do we explain the Brigeport which is not a mirror image. The only thing that is different from the US motors is the tag which is clearly original to the engine says Bridgeport. Clearly a travesty of justice for very high class Bridgeport engines of an older generation. What a slap in the teeth to the older generation. I have three US. motors and they are all junk in my opinion.
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gray4cycle
Posted on Saturday, February 01, 2003 - 10:28 am:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Moderator/Admin Only)

Thanks for all the replies. Unfortunately I am confused. My engine seems to be a close mirror image of Bill Schaller's model O Gray engine. Does anyone know the relationship between Bridgeport, U.S. Motors, Gray, Falcon and Universal? Are there any noticeable differences in the engines? What would be your opinion be on what Manual to purchase for my engine.

John Heasley
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Richard Day
Posted on Saturday, February 01, 2003 - 08:23 pm:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Moderator/Admin Only)

My guess is Bridgeport marketed US Motors under there name and the engine is totally US Motors otherwise.
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Tom Green
Posted on Wednesday, September 10, 2003 - 06:37 pm:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Moderator/Admin Only)

Maybe this would explain why US Motors engine and GRAY engines are similiar.....
Early Chrysler Corporate History
By Cliff Lockwood, October 18, 1968

This article was featured in the November, 1983 issue of the WPC NEWS

1910 -- Benjamin Briscoe organized the United States Motor Company, as an amalgamation of several independents, who were encountering difficulty in securing necessary financial backing. These included: Maxwell, Stoddard-Dayton, Courier, Columbia, Brush, Sampson Trucks and Gray Marine, with the Thomas and other lines being added later.
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nick mccue
Posted on Saturday, October 18, 2003 - 12:36 am:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Moderator/Admin Only)

i have a model o and need copies od drawings of the magy and trip set up. i have the main casting but need copies of all the trip gear . does any one know where i can get these
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r holcomb
Posted on Monday, May 10, 2004 - 06:51 am:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Moderator/Admin Only)

falcon
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rholcomb
Posted on Tuesday, May 11, 2004 - 01:33 am:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Moderator/Admin Only)

falcon5
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rholcomb
Posted on Wednesday, May 12, 2004 - 01:10 am:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Moderator/Admin Only)

u s FALCON Marine Engines are backed by over fifty years of manufacturing experience and proven dependability. These engines
(originally known as DOMAN) have built up an enviable reputation. You'll find them in leading ports
. throughout the world - yes, but a greater tribute to their stamina is the number to be found in the isolated harbors and lonely waterways where repairs are few and dependability becomes all-important.
Many a sailboat has come safely through a gale and into harbor with the plucky 1tid of a U. S. Falcon auxiliary. These two-fisted performers cannot be beat - for auxiliary power, tenders, fishing, and small
pleasure craft. Fishermen like the way they will run all day at low trolling speed without "loading up." Their low speed and heavy flywheel are ideal for swinging a big propeller.
Designed for economical operation - not only from the standpoint of low fuel and oil consumption - but for a long life of useful service.
The two cylinder engine is not suitable for light pleasure boats.

SPECIFICATIONS

One cylinder, 5 H.P. - Two cylinder, 10 H.P. TYPE: 4 cycle, valve.in-head, heavy duty.
BORE: 3-3/4". STROKE: 4-1/2"'.
Cubic inch displacement -5 H.P., 49.7; 10 H.P., 99.4.
POWER RANGE: 200 to 1200 R.P.M.
POWER CURVE: - 1 Cyl.
700 RP.M. 3.5 H.P.
. 800 R.P.M. 4.0 H.P.
1000 RP.M. 5.0 H.P.
1200 R.P.M. 5.75 H.P.

2 Cyl. 7.33 H.P. 8.5 H.P. 10.5 H.P. 12.0 H.P.

IGNITION: Timer and coil, or high tension magneto. FUEL SYSTEM: Float feed carburetor and backfire trap.
LUBRICATION: Combination plunger pump and splash to
constant level oil trough. Designed for angle mounting.
BEARINGS: SAE babbitt lined.
CRANKSHAFT: 2 bearings, fully counterbalanced. (See back page.) Bearings-5 H.P., 1-3/8" dia. x 2-1/2" long. 10 H.P., l-1/2_ dia. x 3" long.
PISTONS: 3 rings: 2 compression, 1 oil.
CONNECTING RODS: Forged steel with poured bearings.
COOLING: Plunger type water pump. STARTER: Hand crank.

DRIVE: Direct or with reverse gear and clutch. THRUST BEARING: Built in integral with engine. COUPLING: For % inch shaft. Keyway. ROTATION: Right hand propeller required. PROPELLER SIZE: See back page.
NET WEIGHTS:

1 CYL. Direct Drive 180 Ibs.
With Reverse Gear 250 Ibs.


2 CYL.-265 Ibs. 320 Ibs.
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Jeff Miley
Posted on Monday, May 17, 2004 - 08:32 pm:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Moderator/Admin Only)

I just purchased a single cylinder U.S. Marine engine like the one pictured above. What years were these manufactured? Does anyone know?
Thanks
Jeff
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Hal Normand
Visitor
Posted on Thursday, February 03, 2005 - 04:04 pm:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Moderator/Admin Only)

John, I have identical Gray model 1-A, serial # 4115.
E-mail me & we can form small support group.
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Willem J. Rupka
Member
Username: bill

Post Number: 11
Registered: 03-2005
Posted on Thursday, August 24, 2006 - 09:46 pm:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Moderator/Admin Only)

This US Motor Corp single cylinder has just arrived at my home. Previous owner said he thought the model name was Falcon but reading through previous email it seems Falcon was a Vendor's name. Anyone know for sure?
Also interested in direction of rotation of this engine. The crank I was given turns the engine counter clockwise (facing flywheel). Is this correct or do I have the wrong crank.
Magneto and intake air filter are missing but see no serious problems in getting this one running.
Please excuse ropes in attached pics. These were just quick shots during unloading.
USMC Falcon?USMC Tag
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Searcher
Senior Member
Username: searcher

Post Number: 200
Registered: 10-2004
Posted on Thursday, July 12, 2007 - 10:58 am:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Moderator/Admin Only)

I would like to crank over my Gray Model O but have a couple of questions before I do it. There is a sight glass on top of the crankcase. One would assume that the oil should be visible in the sight glass but that strikes me as being an awfully high oil level. Is that where the oil should be? What should I use for oil?
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Ernie
Senior Member
Username: ernie

Post Number: 694
Registered: 01-2002


Posted on Friday, July 13, 2007 - 07:25 am:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Moderator/Admin Only)

The sight glas is to see the end of the rod that is attached to a float. The actual oil level should be so the bottom of the connecting rod just touches the oil. Or if there is a dipper on the bottom of the rod it should just dip into the oil.
30 w non detergent should work fine for oil. However I aquired a 55 gallon drum of 10w30 years ago and have been useing it in everything for years and never had a problem.
Hope this helps
Ernie
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Searcher
Senior Member
Username: searcher

Post Number: 201
Registered: 10-2004
Posted on Saturday, July 14, 2007 - 09:20 pm:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Moderator/Admin Only)

Posted on Saturday, July 14, 2007 - 09:18 pm:

Ernie, thanks for the response. That clears things up considerably. The rod and float are nowhere to be seen so they have either dropped down inside the crankcase or they are missing altogether. When I get the chance, I will take the crank inspection cover off and see if it is in there somewhere. The engine has been sitting here in my office largely untouched since I hauled it home last winter. I did unscrew the oil level guage because the glass sight tube is broken. I tried a number of internet sites and local craft stores, etc, but haven't been able to obtain glass tubing of the right diameter (approximately 8.5MM or 0.32"). The internet sites want you to buy some ungodly quantity I would never find a use for and the craft stores only carry limited sizes. Any ideas?
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RichardDurgee
Senior Member
Username: richarddurgee

Post Number: 1501
Registered: 11-2001
Posted on Saturday, July 14, 2007 - 10:52 pm:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Moderator/Admin Only)

*
Glass tubing on ebay !


http://cgi.ebay.com/SIMIX-9-5-x2-MIL-GLASS-TUBING-6-PIECES-PYREX-TYPE_W0QQitemZ2 50140106700QQihZ015QQcategoryZ11812QQrdZ1QQcmdZViewItem

*
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Larry Juneau
New member
Username: grayone5

Post Number: 2
Registered: 08-2016
Posted on Sunday, August 28, 2016 - 05:49 pm:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Moderator/Admin Only)

I was recently given a Gray ONE-5 that is in rough shape. Does anyone know where I could obtain a manual? The engine has a cracked block, that I can weld. I need a new head, manifold and carburetor. Any help that anyone can give me would be greatly appreciated.}

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