1968 Kiekhaefer Mercury 1250ss 6 cyl <br /><br />some background:<br />I got the boat from a relative and it was sittin for 2 yrs.<br />I was having trouble with reverse, the water pump was just replaced before it sat, so we (me and a buddy) checked the upper shift shaft and found that the lower part of it to be very much stripped out from rusting..so i replaced that....now i dont have any gears ..no forward no reverse..ive tried many positions and nothing is workin for me...<br /><br />#1) How do i find the correct position of the lower shift shaft to reinstall the lower unit?<br /><br />#2)Do i need to put oil in the lower unit for the gears to work? Just to try the position.(like an automatic transmission works)<br /><br />#3) What year lower units are compatible with my engine?...so i may change in case of a problem.<br /><br />The motor itself runs great.. no problems at all.<br /><br />Thank you for any assistance.