Home | Classifieds | History | Technical | Links | Store | About Us | Email
Topics Topics Edit Profile Profile Help/Instructions Help Member List Register  
Search Last 1|3|7 Days Search Search Tree View Tree View  

Gray Model U help

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

Author Message
Top of pagePrevious messageNext messageBottom of page Link to this message

Tom G
Visitor
Posted on Saturday, September 24, 2005 - 05:25 pm:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Moderator/Admin Only)

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!Gray Model UGray U
Top of pagePrevious messageNext messageBottom of page Link to this message

richarddurgee
Senior Member
Username: richarddurgee

Post Number: 856
Registered: 11-2001


Posted on Saturday, September 24, 2005 - 09:29 pm:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Moderator/Admin Only)

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 ?
Top of pagePrevious messageNext messageBottom of page Link to this message

ernie
Senior Member
Username: ernie

Post Number: 574
Registered: 01-2002


Posted on Sunday, September 25, 2005 - 03:25 pm:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Moderator/Admin Only)

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
Top of pagePrevious messageNext messageBottom of page Link to this message

ernie
Senior Member
Username: ernie

Post Number: 575
Registered: 01-2002


Posted on Sunday, September 25, 2005 - 03:48 pm:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Moderator/Admin Only)

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


Top of pagePrevious messageNext messageBottom of page Link to this message

richarddurgee
Senior Member
Username: richarddurgee

Post Number: 858
Registered: 11-2001


Posted on Sunday, September 25, 2005 - 05:00 pm:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Moderator/Admin Only)

This is 1913 Krice illustration suggests hooking the intake to hot air source ??

Ki


Ernie
Could you post a photo of 1923 "U" Gray and its serial number ?
Top of pagePrevious messageNext messageBottom of page Link to this message

ernie
Senior Member
Username: ernie

Post Number: 576
Registered: 01-2002


Posted on Sunday, September 25, 2005 - 05:53 pm:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Moderator/Admin Only)

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
Top of pagePrevious messageNext messageBottom of page Link to this message

richarddurgee
Senior Member
Username: richarddurgee

Post Number: 859
Registered: 11-2001


Posted on Monday, September 26, 2005 - 07:11 am:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Moderator/Admin Only)

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.

GU1214

The engines carburetor was on the starboard side!
-
For 1915 Gray turned the cylinder around and added the 5 bolt mount water/pump

GU5bolt
-
These engines then had the Carb on the port side and water/pump aft, like this engine and Tom G's engine above.

Gfgear16

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 !
Top of pagePrevious messageNext messageBottom of page Link to this message

searcher
Senior Member
Username: searcher

Post Number: 56
Registered: 10-2004
Posted on Monday, September 26, 2005 - 07:42 am:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Moderator/Admin Only)

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?
Top of pagePrevious messageNext messageBottom of page Link to this message

richarddurgee
Senior Member
Username: richarddurgee

Post Number: 860
Registered: 11-2001


Posted on Monday, September 26, 2005 - 08:04 am:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Moderator/Admin Only)

It was a Gray option and was used with the Krice Carb also !
Top of pagePrevious messageNext messageBottom of page Link to this message

Tom G
Visitor
Posted on Monday, September 26, 2005 - 09:55 am:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Moderator/Admin Only)

Richard, Regarding the "works" behind the engine in your photo. Were these just "engage, disengage", or "forward & reverse" capable?
Thanks, Tom
Top of pagePrevious messageNext messageBottom of page Link to this message

richarddurgee
Senior Member
Username: richarddurgee

Post Number: 861
Registered: 11-2001


Posted on Monday, September 26, 2005 - 11:02 am:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Moderator/Admin Only)

Gray offered several Reverse gears for their engines.


GG
Top of pagePrevious messageNext messageBottom of page Link to this message

george_iv
Senior Member
Username: george_iv

Post Number: 133
Registered: 07-2003


Posted on Monday, September 26, 2005 - 07:03 pm:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Moderator/Admin Only)

I could use one of those five bolt water pumps to finish an engine if anyone has an extra.

Thanks,
George
Top of pagePrevious messageNext messageBottom of page Link to this message

ernie
Senior Member
Username: ernie

Post Number: 577
Registered: 01-2002


Posted on Monday, September 26, 2005 - 08:34 pm:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Moderator/Admin Only)

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)
Top of pagePrevious messageNext messageBottom of page Link to this message

richarddurgee
Senior Member
Username: richarddurgee

Post Number: 862
Registered: 11-2001


Posted on Tuesday, September 27, 2005 - 08:13 am:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Moderator/Admin Only)

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 !

Add Your Message Here
Post:
Bold text Italics Underline Create a hyperlink Insert a clipart image

Username: Posting Information:
This is a public posting area. Enter your username and password if you have an account. Otherwise, enter your full name as your username and leave the password blank. Your e-mail address is optional.
Password:
E-mail:
Options: Automatically activate URLs in message
Action:

Administration Administration Log Out Log Out   Previous Page Previous Page Next Page Next Page

Home | Classifieds | History | Technical | Links | Store | About Us | Email
&copy 2005 OldMarineEngine.com, P.O. Box 188, Forest Dale, VT 05745-0188 • Phone: 802-247-4864 • All rights reserved.
   Marine Engine Seloc Repair Manual Lookup Tool

marine gas engine repair and restoration