ContinuousWave   Whaler   Moderated Discussion Areas   ContinuousWave: Whaler Repairs/Mods   Gunk after decarbonizing    search | FAQ | profile | register | author help

Author	Topic:   Gunk after decarbonizing
specktrout	posted 05-16-2005 06:06 PM ET (US)         I have noticed that the subject of decarbonizing engines has come up repeatedly recently. I am a firm believer in the practice and when using the boat a lot, probably do it 2-3 times a year. Whenever the engine seems to be rougher than usual, running some engine tuner (the johnson brand as I have a johnson engine) definitely seems to improve performance. Having said all this, I am always amazed at the amount of grey-brown goopy gunk that comes out the exhast afterwards. I have always assumed that this is the burnt off carbon from the cylinder walls. Does anyone know how much of this is actually removed carbon and how much is residual decarbonizing agent? The reason I ask is that if I do it once and a lot of stuff comes out (one would think that if it's all carbon), the process should be repeated until no further stuff comes out. If it's mainly decarbonizing agent, I will continue to use it on a more as needed basis and consider a successful treatment one that makes the engine run better. Thanks for any info-
bsmotril	posted 05-16-2005 08:15 PM ET (US)             Most of it is probably the tar like oil residues, deposited in the exhaust housing, and now liquified by the decarb. A lot of that two stroke oil never burns, and ends up in the exhaust. Much more so on older motors than DFI/EFIs. BillS

Hop to: ContinuousWave: The Whaler GAM or General AreaContinuousWave: Whaler MarketplaceContinuousWave: Whaler Repairs/ModsContinuousWave: Whaler PerformanceContinuousWave: Cetacea CommentsContinuousWave: Small Boat ElectricalContinuousWave: Trips and RendezvousContinuousWave: Post-Classic WhalersMETA-Discussion