Source for O ring in fuel line connector for Yamaha 4hp outboard

[tudorsailor]

Once again the little O ring inside the fuel line connector for the Yamaha has broken. When this happens fuel drips out the line when unattached and then no fuel goes in to the motor resulting in embarassing conking out.

It seems wasteful to keep buying the whole connector. Sure one can replace the little O ring? Does anyone know what size the O ring is and where to buy one???

Thanks

 

[MoodySabre]

There seem to differing ones yamaha outboard fuel connector O ring - Google Search
if you can measure it then I might well have some that I could send you.

 

[Boathook]

I've ended up buying a box of O rings from lidl and then some metric and imperial ones from I seem to remember Screwfix. All the sizes very slightly different, but importantly 'fuel' safe so multi use.

 

[Malish]

its probably made from neoprene which is reasonably fuel resistant but one made from nitrile would be better

 

[saxonpirate]

I've ended up buying a box of O rings from lidl and then some metric and imperial ones from I seem to remember Screwfix. All the sizes very slightly different, but importantly 'fuel' safe so multi use.

This ^^^^ buy yourself a box.. I did and have never regretted it..

 

[andsarkit]

When I did a Johnson O ring I used the method in this video.
O ring replacement
You use a rod or small parallel punch from the hose end to tap out the retaining disc. It all comes apart easily and causes less damage than using picks and levers.

 

[tudorsailor]

When I did a Johnson O ring I used the method in this video.
O ring replacement
You use a rod or small parallel punch from the hose end to tap out the retaining disc. It all comes apart easily and causes less damage than using picks and levers.

Wish I'd read this an hour ago. I just destroyed the connector trying to get the o ring out. No way can I do it from the engine end. I will now create a holder for 3D printing and try knocking through from the hose end.

 

[B27]

Some of those connectors, the seal is more like an 'oil seal' or shaft seal.
Look for a better connector?

 

[tudorsailor]

I have now taken out the seal using a block that I printed. It is not an O ring but a tiny lip seal Internal diameter 7mm and outside diameter 17mm.
Now need to find a source for replacement seal and then make a 2nd block to make putting the connector together


Still learning

TS

 

[Malish]

post #2

 

[tudorsailor]

Now ready for reassembly once I have the seal



TS

 

[vyv_cox]

Nitrile is OK for gasoline but far from ideal. Its life will be limited, which is maybe the source of the persistent problems. Viton would be far better, ideally Viton GF but you will probably be offered A or B.

 

[PaulRainbow]

Now ready for reassembly once I have the seal

View attachment 163637

TS

Make sure that the seal you use has a stainless spring.

 

[Halo]

Every size of o ring seems to be available for purchase. The trick is to measure the old one. Get a cheap vernier calliper and measure the diameter of the rubber forming the ring - this is one of the two dimensions that you need. It will be either metric in half millimetre steps or imperial. Then measure the inside diameter. You should then be able to find a replacement

 

[tudorsailor]

The seal is a little lip seal and not an o ring

However it does not have a spring inside, SS or otherwise

Thanks

TS

 

[MoodySabre]

Genuine Fuel Connector O RING Yamaha Mariner Outboard 93210-08287 | eBay

 

[tudorsailor]

Genuine Fuel Connector O RING Yamaha Mariner Outboard 93210-08287 | eBay

Thanks. It is advertised as an O ring and not a lip seal. Of course the connector I dismantled is Yamaha compatible but not necessarily Yamaha. I do not know when or where I bought it. I wonder if the OEM connector is different.