Our kicker is a 6hp Tohatsu 4-stroke (wgt 55#). It is adequate in the event we ever need it. After thousands of miles of boating and tens-of-thousands of miles trailering, the swim step shows no sign of stress.
Two items I'd probably change if we were to do it again:
1) Buy a small OB with a built-in fuel tank. Our kicker relies on the main tanks for fuel, and yes, contaminated fuel is a potential weak spot in our arrangement. Happily, we haven't run into bad fuel ... but you never know. Having even a small built-in tank with stabilized non-enthanol fuel would be comforting.
2) Buy a regular length shaft. Our kicker is a long shaft, and works fine, but in the tilted-up position it only clears the water by mere inches. I think a regular length shaft would have been slightly better.
I like the Tohatsu. It seems like a good motor, light weight, and available at a good price. One strange feature though.... It does not have an OFF button. When running the OB, to shut it off you've got to pull the clip on the emergency kill switch(lanyard), then reinsert the clip to restart. Seems like a silly (cheap) arrangement to me.
Best,
Casey&Mary
...currently in Yarmouth, ME but headed to FL (eventually)