i just bought my first boat(1973 fibreform with 1971 50 hp merc, remote controls). controls were apart and detent roller was missing. when putting the two halves back together, the seloc manual shows the warm up lever in the off position. i cannot make these two halves go together as the cam roller wont enter the face cam. if i open the lever it will go to a position where they will go together. after putting them together i tried pull starting the motor and it kicked back on me hard. the motor did start but i think it was in gear. prop was turning. how can i be sure it is in neutral?