I would get the 55lb thrust. Atleast you know you will have the power , if the wind does pick up . I have used both on my float boats. 55 was the cats meow. I only went with the 30 now due to weight, but that should not be an issue for your float boat.
I was not a big fan of the earlier Mercs. The Johhnyrudes are a different story, An early 80's to early 90's era Johnson or Evinrude 4-6hp would make a great addition to an inflatable boat. Probably one of the most reliable small motors of the time. Tons of them out there as well if you needed to find parts. That's just my opinion having owned a 4, a 6 and a 15hp Johnnyrudes over the years. I also owned a 9.8hp merc on a duck boat way back. It was a pile of junk and broke down constantly.
I agree with Akrisoner, with this budget electric motor would be best if not the only option.
Similar inflantable + 30lb thrust motor was doing fantastic with 2 people on it. The only thing is you have to be careful with winds.
not gonna lie...if i were you id buy a used electric trolling motor and call it a day. It will be better for fishing and get you out into the lake at an affordable cost. Thats just me though.
Rock Auto in the USA. Like 20-30 bucks USD. You'll have it in a week an shipping isn't too bad. Myself and many other people I know use them all the time.
https://www.rockauto.com/en/catalog/chevrolet,2000,silverado+1500,4.8l+v8,1358805,interior,window+regulator,10217
edit: Ronzo beat me by a minute.
If it has good compression, I would go for it
Chrysler took the Hp from the prop while others makers took took the hp at the crank So Chrysler out performed other outboards of the same hp
Chrysler outboard’s have had a very poor reputation from the outset. Parts are quite difficult to find. I would not spend my hard earned money on one. I think it will lead you to regret the purchase. If your looking to buy a used 2 stroke I would keep my eye open for a Nissan 9.8hp 2 stroke from the early 2000’s. Japanese made motors that are super reliable and only weigh about 60lbs. I sold one this spring when I replaced the motor on my tin boat with a four stroke. I had it for about 15 years and it was an excellent motor!