i have a 87 evinrude 70 hp that is leaking what looks to be gear lube from where the prop meets the lower unit. when i checked the gear lube it was milky. i just changed it at the start of last season. any ideas? is there a gasket or seal that would need to be replaced and can i do it myself. dont like to pay big bucks if i can do it. also the motor quit on me at full throdle on the river 1 day and now i dont have any spark. i was thinking power pack but i would like some other input before i just buy parts. i know there is alot of ?s but any input would be alot of help.