68-69 Kiekhaefer Merc Lower Unit

[GaryinPa]

I have a 68-69 125. The lower unit has seen better days while the engine runs great.<br /><br />My question is:<br /> What lower units are compatible with this engine? (20" shaft)

 

[y2jericho]

Re: 68-69 Kiekhaefer Merc Lower Unit

My mechanic fitted a 115hp inline 6 lower unit on my mercury 650cc thunderbolt (65hp)<br /><br />So im guessing any lower unit from the era but the ratios would be different and you would need to compensate with the prop ;/