The engine is a 1975 85 evinrude it looks like it needs a new power pack as 1 cylinder has intermitent spark, and coils as two are starting to develop hairline cracks. The compresion is 130 in all holes and it has T&T. my question is given the cost of a replacement with a newer (late 1990's) motor is something like this worth putting the money in? Would alate 90's motor generally be alot better? What are the chances of the lower cranckshaft seals going bad on a model like this as that looks like it would be above my level to repair? I looked on the Kelly Blue Book and the retail value of this motor is $65 in good condition? I don't have a lot of experience with outboards but I have a vast experience with other money pits. If you have any first hand opinions please help.