| Author |
Message |
    
Tom G
Visitor
| | Posted on Saturday, September 24, 2005 - 05:25 pm: | 
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Just got a Gray Model "U", serial number 53U24116. Is this a 1924 Model? What would have been screwed into the intake of the carb? Just a pipe, or some kind of air filter? There's a two direction valve coming out of the water jacket. Is this the outlet from the water circulation path? Would one of the valve outlets have been plumped outside of the boat, and the other just for a "tale-tale" to see if the engine was pumping water? Would it had a muffler originally, or just a pipe plumbed into the water? Thanks for any answers!  |
richarddurgee
Senior Member
Username: richarddurgee
Post Number: 856
Registered: 11-2001
| | Posted on Saturday, September 24, 2005 - 09:29 pm: |
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Tom
1924 is the year, those 5 bolt plate mount waterpumps on the rear showed up in 1916-17 on the "U" models !
The carb looks to be a Krice, maybe threaded for first type flame arrestor ? |
ernie
Senior Member
Username: ernie
Post Number: 574
Registered: 01-2002
| | Posted on Sunday, September 25, 2005 - 03:25 pm: |
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Somewhere I have seen Krice instructions that state they work better with a 3 or 4 in long pipe nipple screwed into the intake. This vintage engine ca 1924 is way before any CG flame trap laws.
From this "new find" it seems Gray overlaped the gear pump "U" (early style) and the piston pump "U"(late style)? My gear pump "U" (early style)is 1923.
Your thoughts Mr Durgee please |
ernie
Senior Member
Username: ernie
Post Number: 575
Registered: 01-2002
| | Posted on Sunday, September 25, 2005 - 03:48 pm: |
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Your comments on the valve are correct. Part of the water overboard and part into the exhaust. Just make sure it can't be shut off completly. The piston type water pump is "positive displacement" and will possibly break something if it has no outlet. For running at a show or for your enjoyment out of a boat just have all of the water from the outlet go back into your water bucket/tank.
The hole/fitting on the other side should be a priming cup.
Pics below
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richarddurgee
Senior Member
Username: richarddurgee
Post Number: 858
Registered: 11-2001
| | Posted on Sunday, September 25, 2005 - 05:00 pm: |
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This is 1913 Krice illustration suggests hooking the intake to hot air source ??
Ernie
Could you post a photo of 1923 "U" Gray and its serial number ? |
ernie
Senior Member
Username: ernie
Post Number: 576
Registered: 01-2002
| | Posted on Sunday, September 25, 2005 - 05:53 pm: |
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Here is a pic. For the year I am going on what you told me a while back. I don't have the sn handy
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richarddurgee
Senior Member
Username: richarddurgee
Post Number: 859
Registered: 11-2001
| | Posted on Monday, September 26, 2005 - 07:11 am: |
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Ernie
The Gray model " U " came out in 1912 and was sold through 1927, the longest production run of the Gray two cycle marine engines. There were two styles of this eng. First style 1912- 1914 was exactly like your eng above and this 1913 catalog illustration.
The engines carburetor was on the starboard side!
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For 1915 Gray turned the cylinder around and added the 5 bolt mount water/pump
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These engines then had the Carb on the port side and water/pump aft, like this engine and Tom G's engine above.
This eng was produced untill 1927 with small differences such as inspection plates - etc.
The serial number 4th back from right is the production year, as all Gray designed two cycle marine engs were, and physical differences denote the decade !
Ernie your eng above should have 3 as 4th number back, and is a 1913 ! |
searcher
Senior Member
Username: searcher
Post Number: 56
Registered: 10-2004
| | Posted on Monday, September 26, 2005 - 07:42 am: |
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Richard, this post shows a Model U gray with a two handled control for the timer and throttle and a Schebler carburetor. Was this control something added later or was it an option with the Schebler? |
richarddurgee
Senior Member
Username: richarddurgee
Post Number: 860
Registered: 11-2001
| | Posted on Monday, September 26, 2005 - 08:04 am: |
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It was a Gray option and was used with the Krice Carb also ! |
Tom G
Visitor
| | Posted on Monday, September 26, 2005 - 09:55 am: |
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Richard, Regarding the "works" behind the engine in your photo. Were these just "engage, disengage", or "forward & reverse" capable?
Thanks, Tom |
richarddurgee
Senior Member
Username: richarddurgee
Post Number: 861
Registered: 11-2001
| | Posted on Monday, September 26, 2005 - 11:02 am: |
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Gray offered several Reverse gears for their engines.
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george_iv
Senior Member
Username: george_iv
Post Number: 133
Registered: 07-2003
| | Posted on Monday, September 26, 2005 - 07:03 pm: |
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I could use one of those five bolt water pumps to finish an engine if anyone has an extra.
Thanks,
George |
ernie
Senior Member
Username: ernie
Post Number: 577
Registered: 01-2002
| | Posted on Monday, September 26, 2005 - 08:34 pm: |
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I still need a flywheel for my "U" with nut and tapered crank.
Is the check valve on the late "U" just for added brass? Or is it a sick engine?
My reference to "sick" is that a 3 port engine that is worn to the point it won't run will in some cases come back to life when a check valve is installed in the intake. (not needed on a good engine) |
richarddurgee
Senior Member
Username: richarddurgee
Post Number: 862
Registered: 11-2001
| | Posted on Tuesday, September 27, 2005 - 08:13 am: |
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Ernie
You've got good eyes, I didn't notice the check valve untill you mentioned it ?? Don't know condition of this engine it's a file photo ! |
graham
New member
Username: mechg
Post Number: 1
Registered: 03-2020
| | Posted on Tuesday, March 03, 2020 - 07:12 pm: |
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I realize this thread is older, but I require some help. I recently purchased a late, model U with a piston type water pump out back. The engine came with a Ford Model T holley carb on it. Can anyone tell me what model Schebler carb should be on the engine so I can hunt for a correct one? Thank you in advance ! |
miro forest
Senior Member
Username: miro
Post Number: 1072
Registered: 11-2001
| | Posted on Thursday, March 26, 2020 - 04:14 pm: |
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Most of the Gray engines that I've seen have a Schebler D carb. That's one of the most common old carbs around. A lot of folks have spares so just start asking around.
You should also have a check valve ( a brass poppet) after the carb, but they are a bit more of a challenge to find. I wouldn't be surprised if Richard D in FLA has a spare check valve.
Make sure that you have a modern gasohol resistant replacement for the cork float in the Schebler.
(still un-infected) Miro |
Ernie
Senior Member
Username: ernie
Post Number: 2571
Registered: 01-2002
| | Posted on Thursday, March 26, 2020 - 06:00 pm: |
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Gray Model "U" engines are 3 port and don't need a check valve. See my post up above about using a check valve on a 3 port engine.
All is sell here in SE MA at this time
Ernie |
