Thread: Black gummy sludge in intake ports
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Old 06-28-2020, 12:20 PM   #5
Y-Blockhead
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Join Date: Jul 2011
Location: Redondo Beach, CA
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Default Re: Black gummy sludge in intake ports
I add 1 oz Seafoam per gal. at every fill up. seems to keep things clean. I also shut off the gas and run the the carb M/T when parked.
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