Yanmar 3YM20 coolant pipe connector size please?

[picardy]

Hi

I want to connect a 10mm stern tube hose to this pipe on my 21hp Yanmar (2021 engine year) (and am advised is the correct one pipe), but am not at the boat. Does anyone know the ID dimensions of this pipe so I can order the right t piece?

Many thanks

 

[VicS]

Deleted

 

[Laysula]

I have a Yanmar 3GM30f and I replaced the heat exchanger to exhaust hose with 16mm i/d pipe.

 

[bristoljim]

Hi

I want to connect a 10mm stern tube hose to this pipe on my 21hp Yanmar (2021 engine year) (and am advised is the correct one pipe), but am not at the boat. Does anyone know the ID dimensions of this pipe so I can order the right t piece?

Many thanks

Be careful when making such a connection to the stern tube as the engine waterline will change to that at the stern tube exit & when you pull a stern wave it comes up a long way & can back feed into the engine - how do I know!
Jim