How much would you worry about a "wet" stringer? The guy say that it will pass a survey though???

as long as it is not rotting, or to far gone it can be controled treated and stoped.

The source needs to be located and fixed though.

What is to far gone? If it passes a survey does that mean that it is not to far gone?

How long ago was the survey done? If it not recent, you may want to have it looked at again. I would be skeptical...the surveys are not really pass fail...they just tell you what is really there. In Ohio that water freezes in the winter and causes more damage.
JRider

Freezing may cause a hair more damage but it arrests the rotting process for several months a year. Also the dryness of winter helps dry it out. I'd much rather have a wet stringer in Ohio than wet, hot Florida. Check everything wood carefully, esp the transom.

If a stringer is wet most likely there is other spots wet too, what model and year is the boat?

I guess there using a moisture meter,it it alittle bit of moister or wet


They say a certain percentage is acceptable

I think the level is about 15%. Any wetter than that and they'll definitely rot.

There's usually more than one wetness point. If the manufacturer missed one sealant point, they probably missed more. There's really no such thing as "dry out" on fiberglass-encapsulated wood. If the water saturated the wood thru something as small as a screw hole, the wood wil be rotten crumbles before the moisture escapes the way it came in.

if the stringer is wet I would also ck the transom

I assume you are looking at this boat to purchase? If thats the case, I'd get a very clear understanding of extent, cost to repair, etc. prior to moving forward.
I've found out from experiance its a lot easier to get into some things than out of!