Seaboard Marine - Custom Marine Diesel Repower Specialists

Seaboard Marine - Custom Marine Diesel Repower Specialists

Powertrain and Equipment design, Engineering and Sales for Marine Applications

On-Line Consulting & Toll Free Phone

www.SBMar.com

Seaboard Marine
2947 W. 5th. Street
Oxnard, California
93030-6486

Tony's Tips

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Crankcase Ventilation and the Cummins 5.9 'B Series' Marine Diesel - For the past 15 years I've been thinking about (and trying to understand) the crankcase breathing system on the Cummins B Series engine in typical marine applications.

Aftercoolers - What you need to know about marine aftercoolers

Boost and EGT - What are turbo boost and EGT, and what are their relationships and importance to the operation of a diesel engine in a boat?

Choosing the right diesel - How to choose the right diesel engine.

Crankcase Ventilation - Most of the modern diesels of today (2-15 liters or so, where most of my experience lies) have a minimum of ring bypass and create very small amounts of crankcase blow by.

Engine Life vs. Engine Loading - I'd like to express a few thoughts on this subject as it has come up many times in the past (at least indirectly) and many times just after some type of catastrophic engine failure that some unfortunate boater has experienced.

Engine Life - There seems to be a perception in this industry that if an engine is rated 2800 RPM and the manufacturer says that you can cruise at 200 RPM less (2600,) that "200 off the top" still applies if the boat can only reach 2710 RPM.

Exhaust size - There are no REQUIRED exhaust sizes for Cummins marine engines; there are RECOMMENDED minimum sizes.

Fuel and Horsepower - There is a direct relationship between the horsepower produced or extracted from all engines in relation to the fuel they burn.

Fuel Filters - Because I've been involved with a lot of older boats that have gone from "slow to fast" when repowered, I've learned that lots of CRAP can get dislodged from the fuel tank bottoms and walls requiring filtration in "steps."

Installing Shafts, Logs, Struts and Rudders along w/ your favorite Engine and Transmission - Replacing a propeller shaft, shaft log, strut, or rudder, one at a time is a fairly straight forward job as you have a "given" as to exactly where one of these pieces is supposed to end up and probably what it looked like in its original form.

Low Speed Running & "Break-In" of Marine Diesels - There are many perspectives and opinions floating around in the marine world that characterize low speed running or low loading of a diesel engine will adversely affect its life.

Marine Exhaust Systems - Exhaust system design, fabrication and installation has become a large part of our business and it seems ever changing as to new ideas and designs that need to be done in order to accomplish what is needed.

Marine Fuel Filtration - "The Seaboard Way" Because of the changing requirements of the modern "Common Rail" fuel systems that are showing up w/ the new Tier 2 marine diesel engines, it's time to revisit this subject to be sure ours readers have the most up to date and field tested information available to protect their investment.

Propeller installation / Big Nut vs. Little Nut - To answer a common question that seems to pop up quite often and without getting too technical, you'll find that the thin nut is supposed to go on first and torqued to something less than full spec.

So what do all those propeller shaft numbers really mean? - If you go back about 30 years, there was a very popular product on the market called "Sealoy" that became the alloy of choice for propeller shafting.

Sleeves - The first time I heard the term "throw away engine," was back in the early 70's and someone was referencing the 3208 CAT.

What is white smoke? - What causes white smoke? What is white smoke? What can we do about white smoke? Why does white smoke seem to be more of a problem now than it was fifteen years ago?