Water in exhaust

[brss1977]

Hi their i have a 2009 20hp 2 stroke yamaha outboard and am curious to know why it has just started to blow water out of the top 2 exhaust ports. In the water it looks like a steam boat what can cause this to happen.

[rodbolt17]

its supposed to.
its how the exhaust gets cooled.
those two ports are called idle relief.

[brss1977]

its supposed to.
its how the exhaust gets cooled.
those two ports are called idle relief.

Yeah righto cheers just seemed a bit strange that it's only just started to do it.

[Livinlinelife]

Is it possible maybe you just started to notice it?

[TownsendsFJR1300]

From my F150 but yours should be similar

[brss1977]

Cheers for the input everyone turned that the cooling pipe was blocked up at the engine port only allowing water to the bottom cyl top cyl was just creating steam and getting rather hot now to order a heap of gaskets joy joy.

[TownsendsFJR1300]

Glad you found it!! Beats not fixing it and having a blown motor..

Please post after your final test run..