Systems & Propulsion

The packing material encircling your shaft and tucked out of sight inside the packing nut is truly your boat’s Achilles heel. Installed improperly it...

As the threat of global warming is forcing policy makers around the world to explore ways to wean their economies off carbon based energy...

Once more, the bulk of the past year’s testing focused on maintenance products, safety essentials, and do-it-yourself substitutes for higher priced marine gear. Part...

Canned gasoline products like TruFuel formulated without ethanol and using more highly refined alkylate base stock offer the promise of improved storage stability. Could...

A client sent me an excerpt from your eBook “Marine Electrical Systems,” and I was a surprised to see the following line of thought. Use...

Sanitation systems aren’t the sexiest part of sailing, but they are, well… necessary. And although the risk of transmission of COVID-19 through means other...

California’s decision to ban sale or use of several chemicals found in marine products (above) is of interest to PS readers. After a careful...

After years of testing fuel products and systems, PS began to suspect that mixed metals in the system could be causing harm.

Something we have long noticed at PS is that gasoline and diesel control samples in our aging and corrosion studies never really age much. Only when the samples include metal samples do they generate gum and discolor. One explanation is refinery stability treatments, but the primary difference is that copper and zinc ions are powerful catalysts for polymerization. Shore-side fuel storage systems do not experience this type of break down because copper tubing, brass fittings and galvanized pipe are forbidden by code . The following requirements are quoted from standards groups and OEMs.

What about fuel bladders? Fuel bladders must meet a higher standard than water bladders, but many of the findings from our water bladder test apply to fuel as well (see Practical Sailor Drops, Drags, and Dissects Three Flexible Portable Water Tanks, PS October 2007).