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Thread: Safe to use on Johnson 150 outboard?

  1. #11
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    Deep creep is good stuff and has lubrication in it as well. It helps clean carbs some but it is more of a carbon remover. Do a super concentrated mix in your premixed gas and get the motor up to operating temp and shut it down for 20 min or so to let it work on the carbon on your rings. Then go for another spin for a short bit and at a slower speed to flush the gunk out and let it sit again. Repeat the process until out of the concentrated mix. Some like to run 25:1 for a tank afterwards for extra lubrication in case any big carbon pieces come free at high rpms.

  2. #12
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    Motor is purring along now! Letting engine sit for 24 hours with the heavy mix and then will run the rest of the mixed gallon through. Thanks guys! There was a ridiculous amount of gunk that came out the 20 minutes or so I let it run


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  3. #13
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    CrappiePappy is offline Super Moderator - 2013 Man Of The Year * Crappie.com Supporter
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  4. #14
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    For deep cleaning of previous two strokes I would use the one bottle in one gallon method and alternate hooking up to a small portable tank and the onboard gas tank. 3-4 cycles on the water while opening her up after she smokes you out on idle usually did the trick and noticed a noticeably smoother idle.

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