Cooling Systems

Cooling System Failure Since most engine failures are coolant related, mastering your coolant program is by far the most cost effective way to extend engine life. What happens when coolant isn’t maintained? Cavitation erosion (CE) begins causing liner pitting, CE is a...

John Deere Press Release-New 6090 Marine Diesel

John Deere Power Systems Launches The New PowerTech 6090SFM75 Marine Diesel Engine WATERLOO, Iowa (October 28, 2008) —– John Deere Power Systems (JDPS) is pleased to announce its newest marine engine will be on display at the 2008 Ft. Lauderdale International...

The Motor Yacht Sarah Elizabeth Banks

Malcolm Harker’s 60′ Motor Yacht (MY) Sarah Elizabeth Banks, named for his wife Sarah, began life in 1906 as a steam powered, fire-fighting “river-watch” boat in Sunderland, England. First named the Steam Ship (SS) Fire King, the riveted hull vessel was...

Old Iron

Today we’ll cover some of the realities of older engines that will help you decide the best route to take as your engine comes up for rebuild or replacement. One of the most challenging aspects of using older diesel engines in a marine operation is managing...

Recognizing Combustion Chamber Configurations

This drawing compares the location of combustion chambers between many, if not all gas and diesel engines. This important difference becomes critical after an engine submerges or gets water, fuel, or coolant above the piston. When an engine is hydraulically locked...

The First Ten Seconds

If we could look inside a marine engine and watch what’s happening during the first ten seconds of a cold start, we might be surprised! Over the life of an engine, eighty percent of the wear to engine bearings will take place as the engine begins to turn without...

Plug That Critical Passage!

When working around critical passages and scraping gaskets, be sure to plug the opening, as shown here. Next, scrape the gasket, taking care to work around the shop cloth. This practice will protect the engine from contamination. (Some of this material excerpted from...

Troubleshooting Low Power

There are many mechanical or electrical things that can go wrong with any boat engine. Troubleshooting is the process of reducing the number of variables to a very small number of realistic possibilities that can affect the engine in question. The following list will...