Re: 120/ 125 force
Pnwboat is correct, the gear ratio is different.
I just wanted to add that I installed a lower from a 89 125hp to my 94 120hp and it does the job well.
You do have to watch your tach though because it will rev over 5500 rpms easily.
My boat is a 1994 Maxum 18' open bough, and with the 89 lower I was hitting about 36 mph
With 3 adults and to small children ages 3 & 5 and I kept the rpms just under 5500.
Now with just me I could easily reach 38 mph and over tach easily. But I never let her run over 5500, and I try to keep it at about 5300 rpms.
Hole shot was acceptable with 3 adults and to kids, but by my self its like a rocket.
By the way im running a 15 pich prop and going to get a 17 pich for cruising the lake.
Point is the 89 lower will work but its very very important to watch the tach. Running these motors
over 5500rpms will kill em.
