Kevin,
Have you had your injectors serviced (rebuilt) or replaced? I seem to remember that W/U recommends every 1000 hours or so. That might be a contributing factor. The new prop is definitely another factor.

Tom's idea is good but I think part of it is just having a diesel. Take a look at a diesel sport fishing boat's stern after a fishing trip (around here it would be out to the Canyon which is ...I think... a 4 hour trip for them, two weeks or so for us)) and you'll see what I mean.

BTW - What's the best product you've found to remove this soot?

A little polishing compound on a rag is what I've found works best, but would love to know other ideas.

I am going to use Windex Spray this season to clean the carbon black.It worked great on the boat this spring to clean stern and other stained places.

Jack F Stewart
1993 C36 #1233"Windancer"
Port Clinton, OH

I use Spray Nine, takes multiple applications but it gets it off. Or All Off, takes fewer applications but it's about 3X the price.

Even after my usual spring cleaning with Fantastic, I still had some fairly large areas that were still soot stained. I wound up hitting it with FSR, which did a really good job of removing the stubborn stains. I had the FSR out to remove the Chesapeake mud stain around the waterline, so gave it a try on the soot and it worked out well.

I learned about this stuff on cruisersforum

[url]http://www.homedepot.com/p/Gel-Gloss-12-oz-One-Step-Fiberglass-Aerosol-C...

They also make it in a liquid, a can the size of a small acetone can. HD didn't have that in stock. The skipper on cruisersforum spoke very highly of it. I cleaned up the transom and underneath the bustle with FSR and boat soap (Simple Green) and then used this stuff. Seems to work better than the Collinite Fleetwax, which would tend to "catch" dirt. A simple hose works well to keep it clean. For $7 bucks it was worth it, 'cuz that's a hard area to get to.

Stu, it's not hard to reach at all, as long as you can swim and wax at the same time ;) Too bad I can't do that:rolleyes:

I think you could hire some of the those Sycronized Swimmers that do the water ballet's. They could put the wax on while you watch.

Hey, great idea. But I consider myself fortunate that my wife lets me go away to the boat by myself (retired) while she slaves away at home to support me. Somehow I think the waxing/synchronized swimming beauties might jeopardize that arrangement.! :p

[QUOTE=plaineolde;18301]Stu, it's not hard to reach at all, as long as you can swim and wax at the same time ;) Too bad I can't do that:rolleyes:[/QUOTE]

Without the swimming beauties, I just turned our boat around in our slip (we go bow in normally), and used an ACE Hardware extender.

I must admit that I couldn't figure out why or how the mermaids were trying to pull me into the water. :confused:

Gary,

I have a very similar situation, not retired, just tired. The bathing beauties would likely risk my scrubbing an inflatable dingy rather than the transom of a C36.

Kevin - please don't feel that 3 posts are too many - it's what most of us are here for any way.
I and the Admiral just made a boat move from Sandusky Ohio to Cheboygan Mi - 10 days - and you should see my transom!  And - just after the Admiral put 2 coats of Fleetwax on it!
I was searching for this info and surprised to see so many with this issue.  I've seen some boats with extended pipes - hoses sticking down into the water - etc - but I don't think that completely fixes the issue. Diesels smoke and with our transoms and canvas's creating an air pocket behind the boat - I think it is a common problem. We even got it in our cockpit on the trailing wind days so we had to ventilate more.  I would love to hear that someone has a solution - but I won't hold my breath.
We also used the Spray Nine and it did eventually come off but I'm going to try to use the product from Home Depot to see if it's better. And - YES Sail More!!!

I see this as a common problem with all diesel engines.They are just dirtier than most gasoline burning engines - just look at your engine oil for comparason. Nevertheless, we are using a product called 'L.A. Awesome' found at the Dollar Store and other vendors with success. Seems to cut through the diesel soot with ease. Stubborn stains can be remover with Oxcilic acid (or FSR) Severe stains with a solution of toilet bowl cleaner or muriatic acid- which must be used with caution.