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Gray Sea Scout

Old Marine Engine » Gray Marine Gas Engines - 4, 6, and 8 cylinder » Gray Sea Scout « Previous Next »

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andrew
Posted on Friday, April 09, 2004 - 02:14 pm:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Moderator/Admin Only)

I got the following note from John Greenup:

Quote:

I have a Gray Sea Scout made by Gray Marine. It is a Model S-S S/N 61655. the block s/n is stamped 302289ZXB. It has a Wico Series C magneto which is early.

It does not look like a Sea Scout 91.

Does anyone know what this is?

Thanks,

John greenup


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olarry
Posted on Saturday, April 10, 2004 - 12:27 pm:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Moderator/Admin Only)

Well the engine number looks like a hercules ZXB.One book i have lists sea scout 45 and 91.So maybe you have a 45.
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Bruce
Posted on Saturday, April 10, 2004 - 01:47 pm:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Moderator/Admin Only)

Serial number makes it a 1936 model- search some old power boating magazines that era for some ads.
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olarry
Posted on Saturday, April 10, 2004 - 08:06 pm:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Moderator/Admin Only)

ZXB's are very small 4 cylinder engines and are rated 15hp in garden tractors.I have a service manuel (condensed) that covers them.They have poured babbit rod bearings.
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johngreenup
Posted on Tuesday, April 13, 2004 - 11:37 pm:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Moderator/Admin Only)

thanks for your help...

I suspect it is a Sea Scout 45 a.k.a. Hercules ZXB. Does anyone know what years these were made? Were many made?

John greenup
jgreenup@attbi.com
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pcwroble
New member
Username: pcwroble

Post Number: 3
Registered: 05-2005
Posted on Tuesday, May 10, 2005 - 12:26 pm:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Moderator/Admin Only)

I was told by a marine engine rebuilder company that my Gray Sea Scout was a 91 CU with 25 HP @ 2000 RPM. That was just over the phone after I told them it was a Gray Sea Scout. They said there was only one model ever made of the Sea Scout and that was it. They probably got that info from a parts book since it probably only showed one 91 CU model. After reading this thread, I think mine may be a Gray Sea Scout 45. A previous owner included a Hercules ZX manual along with the Gray Marine manuals so that also points toward the 45. It is Model S - S with Engine No. 61493. The block number is 303763ZXB. It also has another number on a small plate on the transmission case just above the prop shaft that is S-101-A. This engine is in a Coronado 27 sailboat and wasn't original to the boat. Did anyone find out more about this engine? Did anyone find parts for it? thanks
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BART SABINE
New member
Username: sailfish

Post Number: 2
Registered: 06-2006
Posted on Tuesday, June 13, 2006 - 04:19 pm:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Moderator/Admin Only)

I have a Gray Sea Scout in a Bristol 29 sailboat. Can't get the motor to run. Cleaned the Carb, Zenith 61, engine started and ran fine. Shut it down for an hour and best it will do is 800 rpm at full throttle. Cleaned Carb again replaced needle value and seat and still only 800 at full throttle. What else should I be doing?
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Lawrence T Wolfe
Senior Member
Username: larry_from_maryland

Post Number: 174
Registered: 07-2003


Posted on Wednesday, June 14, 2006 - 12:52 pm:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Moderator/Admin Only)

Those zenith carbs have a habit of collecting water around the main jet makeing the engine run rough and not able to picup speed. You can remove an ajustable jet needle and blow it out useing that hole.The real cure is to clean your tank and get a good filter. Try dry gas or a simmilar product.
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Bart Sabine
New member
Username: sailfish

Post Number: 3
Registered: 06-2006
Posted on Wednesday, June 14, 2006 - 02:38 pm:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Moderator/Admin Only)

We decided that perhaps the timing was the problem. In the process of checking that we discovered that two of the spark plugs were bad. We replaced those and the engine would not start at all. Next discoverd that two of the spark plug wires where in the wrong place on the distributor cap. Somehow the engine was running on two cylinders and when we replaced the plugs all cylinders were firing, but at the wrong time and it would not start. After correcting the wires, the engine fired up and ran beautifully. We speculate that when the engine was pulled in the boat yard to replace cutlas bearing that the wires somehow got switched.
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Bart Sabine
Member
Username: sailfish

Post Number: 4
Registered: 06-2006
Posted on Friday, June 16, 2006 - 09:37 pm:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Moderator/Admin Only)

where cn I find new spark plug wires for a Sea Scout
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Andy J
Visitor
Posted on Saturday, June 17, 2006 - 05:27 pm:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Moderator/Admin Only)

Ones from a 4 cyl car enine will work.
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william warner
New member
Username: irwin31

Post Number: 1
Registered: 01-2007
Posted on Sunday, January 14, 2007 - 04:35 pm:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Moderator/Admin Only)

I'm looking for any manuals i can buy on my Gray Marine Sea Scout 4 , 91cu
stagetek@bellsouth.net
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Andrew Menkart
Moderator
Username: andrew

Post Number: 825
Registered: 11-2001


Posted on Sunday, January 14, 2007 - 05:20 pm:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Moderator/Admin Only)

William,

The Gray Marine Sea Scout is covered in the Maintenance Handbook shown on the MarineEngine.com site.
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JOHN DEBATES
Member
Username: cam_gear

Post Number: 9
Registered: 09-2006
Posted on Monday, January 15, 2007 - 11:23 am:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Moderator/Admin Only)

HI WILLIAM,

FOR SEA SCOUT 4-91 MANUALS FOR PARTS AND SERVICE TRY SALES@GRAYMARINEPARTS.COM OR CALL 630-485-5007

JOHN DEBATES
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Kenneth Guest
Member
Username: ken_guest

Post Number: 7
Registered: 03-2006
Posted on Friday, January 19, 2007 - 03:02 pm:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Moderator/Admin Only)

I HAVE A KERMATH SEA TWIN #C621150 AND WAS WANTING TO KNOW WHERE I CAN FIND A FUEL PUMP ASSEMBLY, I HAVE THE PUMP BUT THE LEVER THAT GOES FROM THE PUMP TO THE CAM LOBE IS MISSING
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Mick Dickson
Visitor
Posted on Thursday, February 01, 2007 - 01:50 pm:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Moderator/Admin Only)

Hello can anyone help me? I have a 2Cyl Kemath diesel engine fitted in my narrowboat in the UK.
Its Model No is 2-127 made in approx 1942.Ithink it is also known as a Kermath Hercules.She runs a treat,but i would like to know if any spares exist.Or any other info regarding its history.
Thanks.
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John Porretta
Visitor
Posted on Monday, January 07, 2008 - 11:18 am:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Moderator/Admin Only)

Hi
I have 3 old gray marine engines,4 cyl,gas.
1)model 4-112 serial# 711074-214m 1960's
2)model sea scout serial# 71140 s-s 1930's
3)model phantom 32 1930's
would someone help please,I donated these engines
to mystic seaport,They belonged to Ed Welles.
The irs is saying they are not worth anything .
So I need to know what they cost when they were new & what they cost in 2005 when i donated them.help please.Thanks,John Porretta ph860-235-7211 e-mail jporrett@ebgd.com
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Carroll D. Dove
Visitor
Posted on Sunday, June 03, 2012 - 01:13 pm:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Moderator/Admin Only)

I have a Gray Sea Scout 91.
Engine #C13050
Model #RDBS7
Serial #H3078
Does anyone know how old this engine is?
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Jim Anderson
Member
Username: jimanderson

Post Number: 17
Registered: 07-2011
Posted on Monday, June 04, 2012 - 12:19 am:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Moderator/Admin Only)

RE: Gray Marine 4-91 Sea Scout.

I think it is a 1942. Look around on the internet as Gray Marine published a 9 page letter in 1964 detailing years, serial numbers, etc.
Jim
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Jim Staib
Senior Member
Username: drrot

Post Number: 123
Registered: 09-2008


Posted on Monday, June 04, 2012 - 07:18 am:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Moderator/Admin Only)

The Graymarine chart is at http://www.finewoodboats.com/Gray.htm

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