Before 1995 the 4 cylinder Force motors usually had 15 splines. Starting around 1995, they started using crankshafts that had 13 splines on some of the 4 cylinder Force motors, but the crankshaft snout where the flywheel sits is the same diameter as the older Force motors. Somewhere around 1996 or1997 and later motors, they also had 13 splines, however, the snout where the flywheel sits is larger in diameter and used a flywheel that has about a 3/4" tall lip around the center bolt hole that was threaded on the inner circumference for a flywheel puller. These flywheels are easy to identify because of the lip around the center bolt hole.
Below are two photos of the different flywheels which may help it determining which Force crankshaft might work for you. First one is the 1994 - 1995ish. Notice no lip. Second one is the one used from about 1997 - 1999. Notice the lip.
If your original flywheel had the "lip", then it's possible that a crankshaft from a 1997 - 1999 120HP Force motor may work but I certainly wouldn't purchase one without verifying the diameter of the snout where the flywheel sits and the numbers of splines.
Hope this helps.
