Stringer Advice - Repair?

Noticing my 84 SN has some secondary stringer issues starting. The primaries are really solid and looks to by 90% of the secondarys are good [hammer tap check] and floor is solid.

So I'm not ready to dive into a full repair but wondering if anyone has done any small repair in specific areas.
Anyone ever use Git Rot and inject into soft areas with any success?
https://www.amazon.com/Boat-Life-Git-Rot-Penetrating-Epoxy/dp/B0000AZ8MQ/ref=sr_1_2?ie=UTF8&qid=1493221040&sr=8-2&keywords=git+rot

I assume best thing to do is cut the portion out and replace......

Any thoughts/advice is appreciated!

Issue areas::

Denny,
I agree with Chris. Run it as is until you do a complete stringer job.
Git Rot? A couple of problems and the biggest is the wood MUST be completely dry. You would never get it dried out in the boat. It's like trying to dry a sponge inside a baggie. The other is if you can treat an area, the area next to the Git Rot goes twice as fast!

What I have seen on the "2001" series boats is 'raising' of the floors in certain areas, especially around the pylon at the front of the motor box. This indicates water-saturated foam, and a full stringer job is the only true remedy.
One of the areas that causes this is the swim board brackets that "lag" into the transom.
Years ago, I came up with a removable swim platform bracket (I think the first) and was selling to Correct Craft. I installed many sets, and 50% of the boats I saw would have water pour out the screw holes on at least one side of the boat. At the time, the boats were only a few years old.
A friend of mine was a promo rep, Dave Doidge, here in NorCal.
When he would get a new boat, he would mix a cup of resin filler, and go all around the corners of the floor/stringers and patch the seams and holes.
CC was using a very course-weave woven, and there were visible holes in the 'creases'.
Anyway, if/when you do a full stringer job, stop the floor short of the transom, and incorporate an 'open' area where the platform screws penetrate. That way they will not penetrate the foam-filled cavity, and, imho, the boat will survive much, much longer.
Sorry for rambling. Brian

Pete, great question. I had the velvet drive out this winter and last - remember my first inboard boat so I learned through a bit of trial and reading here on the forum last spring when attempting my first alignment. I did struggle a bit to get alignment correct last year - I plan to put the velvet drive in the next couple of weeks. [currently out as my forward clutch pack wasn't working properly]. I'll report back my findings after I get it on the water and test it out.
2 things that have me a bit concerned already ::
1. I have what I would call uncommon wear around the shaft log 'nut' on my old prop shaft.
2. I remember getting a vibration when I hit waves last summer.....

My old prop shaft does have about .004-.005 of run out so it was slightly out as well.

Thanks

The cradle (80+ on the SN) is going to hold the motor in place and save alignment even if the stringers are mush. Not a valid question or concern on a boat so equipped.

I am assuming you have reached into those cracked areas where the floor and secondaries meet and confirmed there's rotten wood in there? The cracking is common and sometimes the wood is solid- in which case a proper repair on the crack wouldn't be a bandaid. If there is indeed mush back there, you're on borrowed time... not much point in trying to seal it back up.

really?

Denny,
As I mentioned, I certainly do not feel you have anything to worry about with your stringers at this point. My suggestion of checking the alignment isn't simply cautionary but from experience on several cradled engines. One did have some pretty bad stringers and after getting the alignment perfect I told the owner to bring it back in a week. He did and the complete cradle had shifted to port. Not much I could do except tell the owner a stringer job was needed.

BTW, if you have any questions regarding propping you boat, Tim is the guy. He without a doubt has the knowledge and experience.