in-line 6 overheating problem

[spareparts]

the water pump in those drives is a weak point, they only have to run dry for about 20 sec before they are damaged, they will also get brittle and break the blades off if they sit for long periods of time. Go ahead and drop the lower unit. Do a search on utube, there are probaly several videos of people doing a water pump on a mercruiser(I'm going to make a video of it one day), i'll give you two hints, drain the fluid out first, and put the gear shift in fwd gear before you drop the lower. Between Ferm, Skools and myself, we've probably explained it 30 times on here, do a search for water pump replacement