driver tells us it's either series 20 or 30..
belt is surely series 30..
if the fixed sheave on the driver (the one closer to the engine) is nearly flat it's a series 30 for sure;
if it's tilted at an angle just like the moveable sheave it's a series20 and you have the wrong belt (and likely the wrong driven unit )
Thanks Sid...one side flat, green spring..pretty sure it is 30 series. Now engine help. Tecumseh model number OHSK120 222024f (H). DOM 6262D. Any idea what size engine HP, CC, etc...Thank you.