i have a 1985 14 hp and i cant get the lower unit off i took out all the bolts and still no luck. there are 4 bolts holding it to the midsection and a stud with a nut on it going from the lower unit to the midsection thats where is seems to be stuck. i removed the 4 bolts and nut and can get the lower unit to move back and forth but it seems to be pivoting on the stud that i cant get free. i tryed heat and PB BLASTER with not luck so far is there a trick to this ? also this is a long shaft engine but looks like it can be made a short shaft by removing an extenchan peice thats between the mid section and the lower unit its about 6 inchs long and bolts on just like the lower unit with 4 bolts. i have also removed them 4 bolts with no luck that seems to move on the stud also like the lower unit does.i also have been lookin for a shop manual for this engine with no luck i am told its a commercial engine and not that many where made