Re: stringers on 87 bumblebee bass boat
Unfortunately, the jumping up and down on the floor and the motor are not very good indicators of whether or not there is rot...
The only real test requires some destructive inspection...
You need to get core samples of the wood from as low and as far back as possible, plus from as many other places, too...
If the drill shavings come out nice, dry and light...excellent...you can reseal the holes with 3M 5200 and enjoy...
If they come out dark, wet and mushy...rot...time to gut and restore...
Once rot has taken hold, especially as far forward as the rod locker, I would suspect there is more...it acts just like rust or cancer...
The floor may feel solid because there is probably floatation foam under it, which tends to add some rigidity and support...
That foam is also a likely candidate to be waterlogged which affects performance of the boat...
Like I said before, if it lived it's entire life under cover, well cared for...then it is possible the structure is OK...
If it has seen a few wet days, out in the elements...all bets are off...
Another thing that happens is previous owners tend to drill holes for the mounting of accessories, in the decks, in the transom, etc...if those holes aren't properly sealed when the hardware is installed or removed, that makes for another entry way for water to get in...
Of course, you could just use it and constantly keep a watchful eye on the transom and make sure the bilge stays dry every outing...
What ever you decide, we'll be here if you need us...
Best of luck and Safe Boating!
GT1M