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joec43 08-11-2006 03:28 PM

help, marsolve no longer available??
My exhaust is plugged, years ago I purchased a product called "Marsolve" and circulated it through the system and it cleaned it up well.

It needs it again, and marsolve is no longer available, what do you folks all use??

tenders 08-21-2006 12:15 PM

A dilute solution of muriatic acid will work too, using it in the same way as you used Marsolve but being a little more careful with the splashes. I think this is discussed at

You shouldn't have to do this very often. Is your thermostat running the engine too hot? That causes minerals in seawater to precipitate into the engine block, making the engine run even hotter, making the cycle repeat itself.

camaraderie 08-21-2006 03:12 PM

Ditto tenders advice. you have zincs on your heat exchanger and are you changing them? Are you sure this is a simple clogging due to salts or could you have thrown an impeller fin into the works?

hellosailor 08-21-2006 05:21 PM

According to their MSDS online at

it is proprietary magic chemicals including "hydrogen chloride aqeuos" and something caustic. In other words, hydrochloric acid aka muriatic acid. You can buy muriatic acid at any masonry supply (and often hidden in the masonry section at Home Depot and such, only the professional brick-and-stone guys know where it is) and it is used for dissolving stubborn calcium buildups and such.

More aggressive than citric aid but readily available.

GordMay 08-23-2006 06:51 AM

Contact Marsolve:
(203)761-8988 or

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