i just purchased a 1984 ranger bass boat with a 115 hp mercury outboard motor on it. I dont have a manual. I dont know where to add oil? do I add it to the fuel or is there somewhere hidden? also, I had it out the other day and it was running well at full speed then all a sudden it bogged down from 45mp to about 30. I stoped the boat and fished and it would not go above 15 mph untill I had a friend shand on the front of the boat it planed out then would go about 25 not hitting on all cylinders. any help would be greatly appriciated
