Re: 1999 120 Force
I picked up a 1998 120 Force about 2 months ago, so far don't regret it. Make sure you're getting a good deal on it though, it's an older engine and not "brand name".
Check the compression, the top and bottom cyclinders are 135-145 psi, and the middle two are 145-155 in the manual. I may be off a little but the top and bottom are rated about 10 psi different. From what I read anything over 120 and less than %15 difference is ok.
had to change the impeller when i first got it but that's been all so far. Should be easy to work on if you got the patience to read a manual.