Time to drain the cooling system on....

[whodunnit]

...1987, Mercruiser 260, V8. I have located and opened the drains on each of the two manifolds.
Where does one look for any other plugs/petcocks/etc. necessary to drain the block?

 

[fat fanny]

Re: Time to drain the cooling system on....

Just bellow the manifolds along the block around the core plugs

 

[NHGuy]

Re: Time to drain the cooling system on....

There's one down low on each side of the block, there's a cooler on the port side of the motor that you better pull the hose off of, and also remove the big j shaped hose from the engine water pump. Poke a coat hangar in the engine drains and the exhaust manifold drains. They get a skim of rust over them that can trap the water and ruin your engine.