I purchased a Mercury mark 20 that I thought was locked up but I have found the problem is the lower unit. I removed the lower unit and now the power head turns over. I can turn the drive shaft on the lower unit back and forth but it will not turn all the way around. I was wondering what special tools are needed to disassemble the lower unit? I was also wondering if a mark 25 lower unit will work?
Thanks
Steve
]I used this small gland nut packing tool I got off ebay. I had to change the pins but it works. My gear case had the same problem. there is a small magnet in the bottom of the case that had come loose and wedged in the gears.no damage, no problem.