Cleaning fuel injectors on a Mercury outboard [SOLVED]

Will Sea Foam Marine PRO clean injectors on 40hp Mercury outboard?

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Jim D.
Jim D.
1 year ago

Sea Foam Marine PRO will work great to clean injectors on a 40hp Mercury!

Here’s the best way to do it:

Add a full can of Marine PRO to a low tank of fuel (1/4 tank or so). Then, operate the engine for at least 20 minutes before adding more fuel (just don’t run out!). The high cleaning concentration is the fastest and most efficient way to clean injectors with Marine PRO.

Johnny Ace
Johnny Ace
8 months ago

How much MAX per qt of fuel. Non Ethanol of course? I’ve got an intermittent miss at idle. Merc 2014 40 ELPT FI 3 Cyl,