My family purchased a new 1985 24' Grumman pontoon boat. Was not super fast, but moved. We could put a kid on a tube in the back with no problems.
I may be crazy here, but a few things to consider.
- A 25 year old pontoon boat may have metal fatigue in the transom. Something to look into
- I do not recall that my old pontoon was rated for much more than 70 HP
- Pontoons 25 years ago were not about performance. They cut through the water and were sucky to steer. Looking back the 35 was fine for the boat. I may have missed this, but if the Merc 40 is newer, it may be more than enough.
Why not mount the merc and try it? If it doesnt work, then buy what you want?
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