I have a Mercruiser 5.0L MPI Bravo 3. This past Saturday, I killed my batteries while playing music all day. I got a jump and got the boat started. I
Likely this is a seawater run engine. The white crusty stuff is mineral deposits (mostly salt) that precipitated out when the water temp got over 150
one drain on bottom side of exhaust manifold towards the rear underneath. The other is on the engine block about 8 inches away down from the first drain.
The second pic is the hole above the thermostat . I blew through and cant so think its just a screw hole to hold something possibley . The first pic
Heres what I found . Am I correct the hose that come out toward the front of the exhaust the hose is where water comes out . I blew through it and no