HAVE USED 97 BIGFT JUST BOUGHT AND NEED TO INSTALL SHIFT SHAFT. NEED SOME POINTERS IF ANYONE KNOWS FOOL PROOF WAY TO STAB IT.NEVER REPAIRED BOAT MOTOR B4. I 'VE BEEN TOLD TOO MANY HORROR STORIES OF IT DONE WRONG. ALSO I HEARD THAT YOU CAN PUT LIKE 5 PSI OF AIR PRESSURE IN LOWER UNIT TO TEST FOR...