Boat Engines

Another superb engine to help complete the JH rangeThis 56.0kW engine inherits the many fine characteristics of the JH range. Low weight, many advanced engineering features and a space-creating low profile give undreamed of space. Four close-pitched cylinders form a compact block while a shorter skirt drops engine height. Sleeveless cylinder walls allow a big bore of 82mm. With the improved power/weight ratio is a better fuel consumption, one of the advantages of its precise direct injection system.

Caterpillar Marine Propulsion Engines are available in five rating classes, tailored to your needs.

November 1, 1998 Caterpillar's Engine Products Division is pleased to announce a significant upgrade of its 16-cylinder 3616 engine for marine fast transport. Power is increased six percent, to 6000 bkW at 1020 rpm, without increasing peak cylinder pressure. Other improvements include smoother acceleration, improved efficiency, better emissions levels, and more flexible installation requirements.

When Detroit Diesel and MTU joined forces, great things were expected. The result, however - the Series 2000 engines - exceeds expectations. THE MARRIAGE of Detroit Diesel and MTU has finally borne fruit - and what a wonderkind it is! The new Series 2000 engines combine successful technologies from both American and German engineering skills.

A close look at how MAN added more muscle to its 401 diesel reveals that bulking up an engine involves more than just a bunch of add-ons. THE ENGINES in a diesel series are typically built on the same short block, but they have multiple horsepower ratings and vary, sometimes dramatically, in price. The price difference often seems greater than the cost of the added parts, such as turbochargers and aftercoolers. You may be left wondering if you're being charged more than you should be for chat extra horsepower. Wouldn't it be cheaper to simply buy the base engine and have the additional parts installed?

Caterpillar 3412: Turning heads everywhere. This 1,212-hp, four-stroke, direct injection, turbo-charged and aftercooled engine with 1,649 cid has more going for it than sheer muscle. This is Cat's electronic response to Detroit Diesel's DDEC system.

Although size is one of the differentiating factors we looked at in our engine comparison, there are other general questions you should ask when making an engine purchase. How do you plan to use your boat? How important is speed? Offshore fishing? Cruising? Sightseeing along the ICW? Where do you use your boat? In high humidity? Will it need to be winterized? Are parts and services readily available? How much of a fanatic are you about keeping your engine room clean? And perhaps most important, how many hours will you run your boat annually?

The Caterpillar 3116 is a versatile engine with a wide range of applications. It's suitable for everything from planing pleasure boats to oceangoing commercial displacement craft such as freighters or bottom-drag trawlers.

A V-12, the D2842 LE402 has a swept volume of 22.1 liters with a 5.04-inch bore and 5.59-inch stroke. Its turbochargers are encased in engine coolant while its charge air is cooled by sea water circulating through an intercooler. 

This year marks the 25th anniversary of Caterpillar's most popular marine diesel - the 3208. To celebrate, Cat is offering the Silver Anniversary Edition 3208. 

In the new DDEC 8V-92TA, Detroit Diesel combines second-generation electronic control with highly developed turbocharged, aftercooled, by-pass blower two-stroke technology and compact V-8 configuration to produce a high power density: 760 bhp from 736 cubic inches and 3.470 pounds (dry). As a result, these engines are almost perfect candidates for yachts the type and size of the Rybovich 54.

These venerable in-line six-cylinder Detroit Diesels boast lineage that dates back some 50 years. The Se· ries 71 engines were originally developed to power World War II Navy landing craft. And today, in evolved form, they can lay claim to being perhaps the most popular Detroits in pleasure-yacht applications, underscoring the soundness of the DDC concept of "evolutionary technology."

MerCruiser puts supercharged lighting in Wellcraft's Thunder.  WELL, HERE WE GO again. My horsepower nerve is twitching, shooting synapse-popping bursts of energy from my brain to my throttle hand. Sometimes it's the smell of Cam 2 exhaust fumes. Sometimes it's the view through my helmet visor. Today it's the unmuffled roar of 1,200 horsepower blasting from the transom. I have to jam those Zero-Effort levers to the wall and buzz awhile. Finally out of the no-wake zone, I nurse the boat onto plane, then slam the throttles home. Thunder rolls off the steel hull of a Norwegian cruise liner, a white flash in my peripheral vision as we howl out Government Cut at 75 mph.

IN JUST OVER a year since its introduction, the Caterpillar 3412 has become a popular choice among large-boat owners. The reason is as simple as a cliche' - this powerplant's combination of speed, efficiency, and reliability. 

We toss around expressions such as marinized or freshwater cooled with abandon - what does it all mean?

The specific method for upgrading the 3412 to create the new 3412HO was threefold: modify the size of its physical envelope, whittle its weight, and increase its power output. Combined, the modifications resulted in a formidable power-to-weight ratio. Power-to-weight ratio for the 5,400-pound standard, turbocharged, aftercooled bundle was 6.3 lb./hp. The new HO weighs 4,950 pounds, develops 1,000 horsepower at the same 2100 rpm, and boasts a power-to-weight ratio of 4.95 lb./hp. Furthermore, the physical profile of the engine was tailored to meet the space-saving requirements of pleasureboats.

KaMeWa waterjets are an excellent alternative to conventional propulsion on medium or high-speed yachts, particularly those that have to operate in shallow-water situations or in waters contaminated with floating debris. Their assets are excellent maneuverability, good acceleration and deceleration, lower noise and vibration levels, fuel savings (nine to ten percent is claimed) over conventional propeller systems, especially above the 20-knot speed range.