Verch,
I think the Yammie and the Suzuki are both fantastic products, but for a 20 of either generation, I would favor the Suzuki 140 over either brands 175, for the approx 80 lb weight savings. I also think the offset drive feature Bushwacker mentioned is a very clever way to keep some weight forward. I believe the 140s performance will be better in every category except top speed, wherein the 175 should beat the 140 but probably not by more than 3 or 4 mph.
If there is one thing I've learned from this forum, it is the "mantra" that "light is right" on a 20 foot SeaCraft hull. A 20 should feel nimble. I don't foresee that sensation with nearly 500 lbs on the transom.
Either way, new power is good. Enjoy!
