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1. An In-depth Look At The
Power Systems Of Motorboat
Engines
Do you want to know what drive systems are
evolving fast and how to choose the best
power-plant? Read this informative article on
motorboat engines to become a happier
boater.
Here, we shall simplify the power systems and
the engines into their basic forms.

2. Outboard Engines
They are located at the transom and come
with their own drive systems. The power-head
is engulfed with a removable cowl for
protection. The motor is found just under the
power-head The middle part of the outboard
confines the drive shaft plus the exhaust
enclosure. This area has a lower unit which is
embedded to the bottom. Often, the lower unit
initiates the propulsion and it can also hold
the jet drive in some situations. A skeg is
incorporated to give better protection against
hard objects. The outboard engines differ in
sizes from large e.g. the new 9.9hp 4 stroke
outboard to the smallest electric models.

3. Some outboards are used as auxiliary powers
by sailors while some inboard varieties come
with outboard kicker motor for extending low-
speed activities like fish trolling or emergency
power.
Inboard Engines
They are found inside the hull. Most people
confuse the inboards with straight-shaft drives.
But the truth is, even the pod drives and stern
drives are, technically, inboards. Inboards
provide thousands of horsepower which
exceeds that of outboards. They use diesel or
gasoline but the diesel option is the only option
for inboards that outperform outboards.
Because they are flexible in terms of
propulsion mechanisms, inboards do great in a
variety of boats.

4. I.Reliability and Pollution
Outboard engines are associated with noises
and water pollution but there are rules and
regulations which govern cleanliness and
engine design. Today, there are 4-stroke and
2-stroke outboards are more reliable,
environmentally-friendly, and more efficient
than the older models.

5. Is There Any Downside?
Yes. The propulsion mechanisms of outboards
are not always as efficient as inboards in
certain categories of boats. One of the
disadvantages of outboard engines is that they
don’t provide full-beam swim platforms. The
best you can get are two smaller platforms on
either side of the engine. Lastly, as far as
bigger boats are concerned, they aren’t always
spacious as you might think. Some of the
inboard downsides include: They are hard to
replace; they take up too much space; poor
power to weight ratio
Undoubtedly, the part of any automotive that
creates power is the engine. The drive system
of the new 9.9hp 4 stroke outboard converts
this energy into thrust. Intuitively, we can
differentiate between the two but the main
problem is that the drive systems and the
engines are usually incorporated together.
when we mention an outboard engine, we are
referring to the lower unit drive system as well
as the power-head Note that the jet engine
exists in both inboard and outboard engine
designs.