Reason for short brass tube attached inside filler cap on 1924 BNL 2hp Johnson

[Monte NZ]

Could someone please enlighten me re the above.

I thought it could be for measuring the oil, but I can  there is a small drilled hole through the side of the tube, so that doesn’t make sense.

If it is for measuring the oil, how do you work out the ratio?

Thanks in advance
Monte NZ

[Tubs]

I believe the tube is intended to keep gas from splashing out of the vent in the cap. I suspect the pin hole is to let air into the tank when – if the fuel level in the tank is above, and blocking off, the end of the tube.  Tubs

 

 

 

 

A "Boat House Repair" is one that done without having tools or the skills to do it properly.

[Monte NZ]

Thanks very much for your reply Tubs…….your explanation makes sense.  I’ve noticed that my Elto ruddertwins have a similar setup.

Thanks again

Monte NZ

PS nearly ready for its first run in possibly 80 years.

[Author]

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