Systems+Engines

High-quality, long-lasting impellers from JMP are manufactured from a mix of different rubbers and include a surface coating that decreases wear and tear for longer use.Tested by the U.S. Navy, the impellers help keep marine engines working at their highest efficiency, even in harsh operating conditions, by ensuring that their pumps are operating correctly.JMP offers flexible

Let there be water

by Peter Nielsen, Posted December 22, 2008
Of all the upgrades you can lavish on an older boat, few will give you more bang for your buck than a complete overhaul of the fresh-water plumbing system. An improvement in water quality should be immediately apparent; any of the new breed of water pumps will be quieter and less power-hungry than their predecessors, and with a little planning, you can make your boat much more user-friendly both
As a marine electrician I’ve found that in-line fuse holders are the most common cause of problems I encounter with modern electronics equipment. Quality marine electronics are generally very reliable, as long as their electrical connections are sound and there is no voltage drop in the ship’s power supply. Unfortunately, all electronic devices come from the factory with in-line fuse holders on

In hot water

by Peter Nielsen, Posted February 16, 2009
ChecklistTools
  • Screwdrivers
  • Wrenches
  • Cordless drill
  • Tube cutter
  • Materials
  • Water heater
  • 5/8" heavy-duty water hose
  • NPT fittings
  • Fasteners, as needed
  • After upgrading the mostly original fresh-water plumbing system on our 1973 Norlin 34 project boat with new hoses,

    Outboard rebuild

    by Sail Staff, Posted February 16, 2009
    ChecklistTools
  • Basic tool kit
  • Wrenches and sockets (metric if you’re working on a European or Japanese engine)
  • Screwdrivers
  • Propane blowtorch
  • Rubber mallet
  • Hammer
  • Razor blade
  • Pliers
  • Vise-Grips
  • Vise
  • 400-grit wet/dry sandpaper
  • Brush for applying grease and lubricating
  • Impeller Etiquette

    by Peter Nielsen, Posted November 16, 2011
    Get to grips with an often over-looked but vital part of an engine cooling system in this step by step procedure
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