Fuel line connector confusion

[Clint KY]

I picked up a Johnson 6 gallon fuel tank and noticed the connector on the tank has 3 large and two small pins. The connector on the tank I originally got and both my Johnson and Evinrude outboards have 2 pins.

I have googled it and am still very confused. There is a two-hose pressurized system for older Johnson motors but the larger unused pin on the tank I got does not appear to have any orifices in it. I cannot find a picture of the tank connector for this type to see if the third pin is part of the pressure system or what.

The connector that fits the motors and the tank I originally got WILL fit the newer tank - BUT - the one larger pin, that does not appear to have any orifices in it, is not engaged in the connector. It just sits along side it. And the two smaller pins which are spring loaded into the assembly on the tank top seem to put outward pressure on the fuel line connector.

Firstly - is the unused larger pin just an alignment pin?
Secondly - is the small gap that appears between the hose connector and the tank assembly caused by the spring loaded pins acceptable?

I don't want to blow a bunch of mixed fuel and oil either into my shop or my boat.

I would appreciate any insight into what I have to do, if anything, to use this tank with my outboards.

Clint
far west Kentucky

 

[pro-crastinator]

SOunds like a pressurized tank connector. Got a pic to post?

 

[F_R]

Ok, one large pin is the fuel nipple. Second one is the locking pin to hold the connector on. Third is to prevent you from plugging the connector on backwards. One small pin is a fuel shut-off to keep fuel from spewing out when hose is unplugged. Second small pin is an air vent. Early tanks did not have the pin to prevent plugging the hose on backwards, so it was possible to do that. ​

 

[F_R]

And yes, spring pressure from the small pins does tend to push the connector away. Especially if the connector is worn.

 

[Clint KY]

No Title

Here are pictures of the connectors. So can I use the hose shown on the tank shown?

 

[F_R]

Absolutely!!!!!