Yes, Sea Foam Motor Treatment (or Marine PRO) would work great in an outboard’s oil crankcase. It will clean and prevent oil residues and deposits from accumulating.
In a 4-stroke outboard: Add 1 ounce of Sea Foam per quart of oil in your outboard’s crankcase. Then, run it for at least one hour, and change the oil. That gives the Sea Foam enough time to circulate and clean.
In an oil-injected 2-stroke, add the Sea Foam at any time.
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Yes, Sea Foam Motor Treatment (or Marine PRO) would work great in an outboard’s oil crankcase. It will clean and prevent oil residues and deposits from accumulating.
In a 4-stroke outboard: Add 1 ounce of Sea Foam per quart of oil in your outboard’s crankcase. Then, run it for at least one hour, and change the oil. That gives the Sea Foam enough time to circulate and clean.
In an oil-injected 2-stroke, add the Sea Foam at any time.
Hope this helps!