I have sort of painted myself into a corner. I'm looking for some advice as to what my options are.
A couple of months ago I purchased a 1972 18' Bayliner Discovery with a 110 Mercruiser. I have not been able to find any numbers on the drive, but it has a 4.75" diameter gear housing so I've read in the manual that it is above serial # 1684188. The engine serial # is 3849449.
As was to be expected from a 37 year old craft there were any number of things that were in need of attention that I've been working through. The latest thing I am attempting to do is replace the LU. Reverse gear is shot in the old LU and when I finally got the prop off I found a crack line on one side of the propeller shaft that runs straight down the shaft from about 5 threads in all the way to just where the shaft enters the oil seal. In any event the Old LU is toast.
I purchased what appears to be a good used Alpha One Gen One LU, but when I pulled the old LU off everything was exactly the same as my old LU except the replacement one has a 13 spline drive shaft, while my old one has a 8 spline shaft. Major problem!
Any ideas? Changing the gear in the upper unit is probably out of the question? What lower unit model should I look for with an 8 spline shaft?
Thanks all.
A couple of months ago I purchased a 1972 18' Bayliner Discovery with a 110 Mercruiser. I have not been able to find any numbers on the drive, but it has a 4.75" diameter gear housing so I've read in the manual that it is above serial # 1684188. The engine serial # is 3849449.
As was to be expected from a 37 year old craft there were any number of things that were in need of attention that I've been working through. The latest thing I am attempting to do is replace the LU. Reverse gear is shot in the old LU and when I finally got the prop off I found a crack line on one side of the propeller shaft that runs straight down the shaft from about 5 threads in all the way to just where the shaft enters the oil seal. In any event the Old LU is toast.
I purchased what appears to be a good used Alpha One Gen One LU, but when I pulled the old LU off everything was exactly the same as my old LU except the replacement one has a 13 spline drive shaft, while my old one has a 8 spline shaft. Major problem!
Any ideas? Changing the gear in the upper unit is probably out of the question? What lower unit model should I look for with an 8 spline shaft?
Thanks all.