Black Transom problem
07-13-2003, 09:38 PM
#1
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Black Transom problem
My boat has twin 350 mag's efi/mpi with the stock flame arrestors there was a little sooting ,,,,well I thought I would try a K&N , put them on Friday and went to the lake today, and when I crank it up it looks like black dust floating on the water and the transom was really black when I pulled the boat out . Do you think that the ecm's need programing because it is getting more air????? any help or advise in greatly appreciated
07-13-2003, 09:51 PM
#2
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Location: West Michigan & Higgins Lake
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Sounds like the K&Ns are restricting the air and causing a richer mixture. Try it without any flame arresters and see what happens. If it runs clean without any flame arresters than you will know that the K&Ns are causing more air restriction than the stockers. Not supposed to, I know, but maybe they are.?
07-13-2003, 10:33 PM
#3
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What octane gas are you running????? You should run the LOWEST recommended octane for your engines--87? It will burn more completely with less black residue and give the best performance.
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