97BossHammer

it's a choke prob on mine....weber carb.....don't have a clue how to adjust it or anything.

Downtown42

I've been told to disconnect and remove choke. I am going to try.

INDY27

I use tried Frenzy on mine and works great! The soot wipes right off.

Von Bongo

Zep toilet bowl cleaner..mix it 50/50..spray on..wait 2 minutes and rise it off..soot gone..then wax... Sno-bowl works well too.

Zyzzyx2123

I use a product called Sled Brite Belly Pan Cleaner. It is actually for my snowmobile belly pan. The first time I used it, the black just ran off of my transom. I use the stuff for cleaning anything greasy or exhaust carbon. It works great and it doesn't screw up the gel coat.

www.sledbrite.com/snowmobile.cfm

Bust-a?

I use Castrol Superclean mixed 50/50 with water and it seems to work well. Some other folks have had the ECM's reprogrammed (on 496's) which supposedly helps with the soot build-up.

I noticed that many of you say waxing helps. My transom seems to get more soot build-up right after I wax it. Maybe it's the wax or maybe I'm just not getting it all buffed off??

Horseplay

Try Roll Off. Spray it on, wait a couple minutes, then wash off.

97BossHammer

I'd like to remove the choke...just don't know how.

LPA2106

Spray with "Fantastik" let sit 5 min and wash with a soapy sponge..works great!

Griff

Run the lowest octane recommended. Higher octanes ignite at higher temperatures. This keeps them from igniting and causing preignition and detonation due to high temps in the cylinders.
A higher octane fuel will not burn as completely as a lower octane fuel. You will actually lose power running higher octanes than needed.

As for cleaning any exhaust residue. Simple Green!!!