Good evening iboats! I inquired about this subject the other evening, erickems said it's not too tough but, the Seloc manual i have makes it sound quite challenging, especially in the upper pump housing...removal of seal and insert...Seloc goes on to talk about camshaft types and shims and so-forth etc..etc. actually making this sound more like defusing a bomb. and what about seals between the lower unit and the center section? Is there seals between the two cases, shaft seals etc. and if so are they included in the pump kit? what will i miss along the way, that worries me!