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Need help identifying this 6 cylinder...

Old Marine Engine » Gray Marine Gas Engines - 4, 6, and 8 cylinder » Need help identifying this 6 cylinder flat head gray marine motor. « Previous Next »

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John M
New member
Username: jhkm12345

Post Number: 1
Registered: 05-2016
Posted on Friday, May 13, 2016 - 01:14 pm:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Moderator/Admin Only)

ID Tag says model #122 RD or PD, cannot tell which.
6 cylinder flat head
twin updraft zenith carbs
f6-208 is cast into the intake balance pipe between the carbs.

https://goo.gl/photos/Hid5YhGHGGQuMkKLA
https://goo.gl/photos/vbPQ3KBawasUxnZx8
https://goo.gl/photos/4QYhUrEEHgZCiMuCA
https://goo.gl/photos/jGZ3iEcsHYLWrqwm6
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Jim Staib
Senior Member
Username: drrot

Post Number: 200
Registered: 09-2008


Posted on Sunday, May 15, 2016 - 11:11 am:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Moderator/Admin Only)

date on manifold looks like 11-23-59. Post the numbers on the small round disc on carburetors.
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John M
New member
Username: jhkm12345

Post Number: 2
Registered: 05-2016
Posted on Monday, May 16, 2016 - 06:51 pm:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Moderator/Admin Only)

the numbers on the carbs is 96850 OR 9685C

https://goo.gl/photos/5fUCNEP93f7id2Aa6
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Jim Staib
Senior Member
Username: drrot

Post Number: 201
Registered: 09-2008


Posted on Tuesday, May 17, 2016 - 10:28 am:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Moderator/Admin Only)

Phantom 6-103HP
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John M
New member
Username: jhkm12345

Post Number: 3
Registered: 05-2016
Posted on Tuesday, May 17, 2016 - 02:07 pm:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Moderator/Admin Only)

But what you're listing there shows 1940-52 which is too early for this motor (based on the 1959 casting date you pointed out) also it lists the carb stamp as a 'c' which is not listed here.

I'm not trying to be obstinate, but this still doesn't seem right. That's an awfully early motor for a fiberglass boat from 1963.
Also, it looks like a 103 would have the tach cable drive out of the center of the cylinder head, which mine does not.
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Jim Staib
Senior Member
Username: drrot

Post Number: 202
Registered: 09-2008


Posted on Wednesday, May 18, 2016 - 10:18 am:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Moderator/Admin Only)

The book is from 1952
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tedjohnson
Visitor
Posted on Monday, September 19, 2016 - 03:24 pm:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Moderator/Admin Only)

all:
I have a lugger six-330 engine(Grey Marine) and need to know where the spark plugs are oriented on the head, ike 1 to 6 locations and reelevent to what?(flywheel, distributor, etc.
Ted at energyfex@gmail.com
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Ned Lloyd
Senior Member
Username: ned_l

Post Number: 64
Registered: 08-2012
Posted on Thursday, October 20, 2016 - 10:40 pm:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Moderator/Admin Only)

Do you mean "what is the firing order?" Six cylinder engines are about the only engines with a universally consistent firing order. 1-5-3-6-2-4. #1 cylinder is forward over the flywheel.

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