Systems+Engines

Water power

by Nigel Calder, Posted August 17, 2009
My last two columns discussed the high cost of generating electricity with a diesel engine and the relatively short payback period for solar panels on liveaboard cruising boats. The problem with solar is that it requires a lot of surface area to produce significant amounts of power. This is relatively easy to find on catamarans, but not so on monohulls.Coincidentally, I received an email
My brother was hanging upside down, peering through a 9-inch square cutout in a bulkhead at the raw-water pump housing on his 3-cylinder Yanmar marine diesel. “How the heck do you get the impeller out of there?” he asked me.This is a very good question. Removing an impeller is something that should be done on a regular basis; Yanmar recommends replacing the impeller on this particular

Manual bilge pump

by Dick Everett, Posted August 19, 2009

Gravity Theory

by Peter Nielsen, Posted December 9, 2008
Smell. Pong. Effluvium. Whichever way you describe it, the airborne essence emanating from Ostara’s aged sanitation system was highly unpleasant. More than just an odor but thankfully short of a full-blown stench, it permeated the forepeak and almost caused a spousal mutiny during our first weekend aboard. No doubt about it – something had to be done.The sanitation system comprised a

Filter Your Fuel Off-line

by Chuck Husick, Posted June 15, 2010
It’s essentially true that if you give a marine diesel engine clean oil, clean air and clean fuel, it will run, if not forever, then certainly for longer than you are likely to own your boat. Using good-quality diesel oil and changing out the oil and oil filter at the manufacturer-recommended time intervals—typically every 200 hours—is a good first step. Similarly, if the air intake is correctly

Quiet Connector

by Sail Staff, Posted December 9, 2008
My wife, Gail, and I recently installed a new radar antenna on the keel-stepped mast of our Bristol 38.8. The first part of the installation was easy. We mounted the receiver and then, using a weighted string as a messenger, pulled the cables through a small hole in the mast near the unit all the way down to the bottom, The difficult part—figuring out a way to keep the cables from slapping
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,
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