Can you use a Marine Descaler on an aluminum outboard engine?

We recommend a Hammerhead Marine Descaler Flush every 100 hours, or
twice a year for any engine running in warm, calcium rich waters.  This is
a revolutionary change to outboard marine engine maintenance which has come
about through Bright Bay’s next generation chemistry.  Only Hammerhead
Marine Descaler is made with aluminum safe cleaning agents designed for today’s
high performance marine engines. Now you can even descale your aluminum outboard engine safely!

The attached pictures were taken of a 4 stroke outboard engine
in Key West.  The block cracked with less than 200 hours because marine
scale had restricted water flow for engine cooling.  Because water flow
and scale buildup are a maintenance item, damage was not covered under the
manufacturer’s warranty on the $20,000 motor. A marine descaler would have prevented this damage.

When compared to other brands such as Barnacle Buster, we found Hammerhead Marine Descaler to be as effective and safer for aluminum.

Owners have historically only used “salt away” to flush
outboard engines because acid descalers are not safe for the aluminum
heads.  Salt away does not remove marine biogrowth which ultimately causes
engines to overheat.  The traditional repair method for an overheating
engine is to tear down and rebuild.  We are going to recommend that an
outboard Hammerhead Flush be done with each oil change as a preventative
maintenance procedure for avoiding marine scale buildup, overheating, and
engine rebuilds.

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