Gas fitting for Sea Horse 5 1/2

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Jan 31, 2005
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I need to know where to find a fuel fitting, to motor, for this Johnson Sea-Horse 5 1/2 twin. Would also like any other information I can find on it. On the front the number is 306127 on the side there is a number 1942508 and there is one on the back of the motor 303470. I have no idea what these numbers are. The gas fitting appears to be a 3 connection. 1 for air 1 for fuel and one that holds the connection. [*]
 

Paul Moir

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Re: Gas fitting for Sea Horse 5 1/2

Do you have the pressurized fuel tank too? Those connectors are no longer available, but you can often find them on ebay with a tank. The wearing parts of them (the o-rings) are available so you can rebuild an old one.<br /><br />Those numbers you gave sound like casting numbers and arn't much help. Have a look for a tag on the transom clamp/swivel assy. It should have a model number 'CD-nn'. Failing that, try looking for a silver convex plug on the spark plug end of the block. It's about the size of a quarter.
 
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Re: Gas fitting for Sea Horse 5 1/2

Thanks for the tip we found the model and serial number they are Model # CD-16 Serial # 1942508. Any ifo you can give me would be of great help. Year, fuel mixture..etc. All I have is the motor I don't have the gas tank and can't find a connector that goes from the motor to a tank.
 

Laddies

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Re: Gas fitting for Sea Horse 5 1/2

it is a 1959 most OMC dealers have the fitting used
 

rolmops

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Re: Gas fitting for Sea Horse 5 1/2

Hello. It is a 1959 5.5 horse twin.<br />There is a brand new fuel connector on ebay in the original package.But are you sure that you still need the old type?I thought that the '59 moved to the newer connectors already.
 

Paul Moir

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Re: Gas fitting for Sea Horse 5 1/2

Don't worry so much about the fitting then, instead try looking for a tank. If you're lucky you'll get the fittings you need with it. Check around at the local outboard shops - one might have one kicking around. There's a few on ebay right now. Search for the following:<br />(double line, pressure, two line) tank (omc, johnson, evinrude)<br /><br />That usually finds them all. Tank rebuild kits are still available and you can get them here:<br />Laing's<br /> <br />An alternative is to switch it over to a modern one line tank, but after buying the tank, fuel pump, fittings, etc you need you usually end up in the hole compared to purchasing an old pressure tank and cleaning it up.<br /><br />Here's some more information on your CD-16:<br />Year: 1959<br />HP: 5.5<br />WOT RPMS: 4000<br />Displacement: 8.84 cu.in. = 144.8 ccm<br />Cylinders: 2<br />Weight: 56 lbs<br />Gear ratio: 15:26<br />Spark plugs: Champion J6C (J6J is NLA) gapped at .030"<br />Fuel/Oil mix: 24:1 87 octane gas to TC-W3 rated outboard oil.<br />Lower unit oil: OMC/BRP 'HiVis' or equivalent 90/80w outboard gearcase oil.<br /> Picture From the Old OMC Site.<br /><br />Service manuals:<br />TheOutboardWizard<br />Mastertech<br />Marine Engine<br />Ken Cook<br /><br />EDIT: In '59 the pressurized system was still used in the under-35hp outboards. In '60 they were all regular suction tanks. Well, except for the gravity fed 3hp anyway. Now how did I miss all those connectors anyway?? "(omc, johnson, evinrude) connector"
 
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Messages
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Re: Gas fitting for Sea Horse 5 1/2

On the motor it shows the 3 connection. We need the connector that attaches to the motor coming from the gas tank. I looked on ebay but did not see the connector. Thanks.
 

OBJ

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Dec 27, 2002
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10,161
Re: Gas fitting for Sea Horse 5 1/2

I thought the dual fuel line was done away with somewhere between 63' and 64......can't remember....gray cells ain't what they used to be.... :)
 
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Jan 31, 2005
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Re: Gas fitting for Sea Horse 5 1/2

If I find a tank will a pressurized tank have a threaded air release valve in the gas lid?
 
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Jan 31, 2005
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Re: Gas fitting for Sea Horse 5 1/2

Thanks for all the help that everyone gave me. I was able to get the connection for the motor and got a pressurized gas tank. Now I need to know where to find the hose for the gas tank to the motor and any ideas on how to clean out this old gas tank. It has quite a bit of rust in it.
 

Paul Moir

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Re: Gas fitting for Sea Horse 5 1/2

The Laing's link I posted above has it by the foot, or if you plug those search arguments I gave you into ebay you'll turn up entire tank rebuild kits (including the hose). Cheap.<br /><br />As for cleaning out the tank, if it's got old fuel sludge in it too then get some carburetor/tank cleaner (eg, barriman's) from the local auto shop or auto section of a retailer, dump some in and a handful of old nuts and screws. Shake it up and dump it out.
 
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