3.o liter mercruiser manifold

[kingfish64]

Can someone tell me what the end caps on the manifold are for? Can I clean out the manifold through these and if so, how. thx

 

[o2batsea]

They keep the water in! If they are rusted inside (so bad that they are clogged up) it is better to replace them.

 

[kingfish64]

They keep the water in! If they are rusted inside (so bad that they are clogged up) it is better to replace them.

Thanks o2batsea!