Please help with diagnosis?

[93 Johnson Tracker]

Hi All!
I have a 1993 25hp Johnson Tracker that slobbers tan crud out of the exhaust housing onto the transom bracket when trolling for long periods. At WOT for long periods it seems to dry up and leave a carbonized spot. Is this normal? I can't imagine it is because it's getting the transom bracket pretty hot right next to the lower grease port on the motor pivot. Compression 98/100, using 50:1 Lucas 2 stroke oil. Plugs look OK with similar deposits on both.
Please see pics?
Thanks for your input!
93 Johnson Tracker

 

[Edchris177]

Normal. The downside of two strokes is they do not burn all the fuel oil mixture that goes through them. Slow speed trolling some of it shows up as the gun you see are in the smaller motors. You take them off and set them on a bench they will drool.

 

[93 Johnson Tracker]

Normal. The downside of two strokes is they do not burn all the fuel oil mixture that goes through them. Slow speed trolling some of it shows up as the gun you see are in the smaller motors. You take them off and set them on a bench they will drool.

Hi and thanks for the input.
I don't suppose we can expect a nice even putter from it while trolling? It idles for hours, but it's more of a continuous stutter. I was hoping that once I get it dialed in it will putter along nicely. So far not much luck with the dialing in. The only adjustment is the low speed screw.
Once I think about it, it stutters it's way through the rpm range all the way to WOT. Once there, it hums along nicely, stuttering only occasionally.
Rebuilt carb, fuel pump and water pump, new plugs, serviced the lower end and installed a new stock prop before I put it in service this spring. Put maybe 50 hours on it this year since I've owned it. The plugs pictured have been in the whole time. It's pushing me and a 1989 Gregor 15' welded aluminum boat, maybe 1/2 ton all told. Will do 23-24mph by the Garmin, so I'm happy with it. Hasn't quit on me and gets me where I need to fish!