Our Part# SM4416 OEM# 21597 or SM21597
Works on CL models only wth Presolite alternators
This part can be used on the following model(s):
Nautilus - K2_Climber
Stairmaster - 4200PT
Stairmaster - 4400CL
Stairmaster - 4400PT
Stairmaster - 4600CL
Stairmaster - 4600PT
How to Install a Pulley or Flywheel on your Alternator