AquaCraft 15 Marine Engine - Manual (Page 3)

Ways to Ensure a Long Life for Your Engine.
1. Keep your engine clean. Dirt will act as insulation on an engine.
It will not be able to shed heat as easily.
2. Do not over-lean your engine.
3. Make sure that there is good water flow through the cylinder head.
4. Do not over heat the engine. This goes along with keeping it
clean, not over-leaning the engine, and periodically checking the
water-cooling lines.
5. Do not use a fuel with low oil content. Make sure that you use a fuel
from a reputable manufacturer that is labeled as model engine fuel.
6. Avoid using old fuels in the engine. Always run all of the fuel out
of the engine. After running for the day, use after-run oil and work it
into the engine by pulling the recoil starter 3-4 times.
7. Do not use a fuel with a nitromethane (often called nitro) content
over 20%.
8. Do not use silicone sealer on the engine joints. Silicone sealer
contains acetic acid, which is corrosive if it gets inside your engine.
9. Store your engine someplace where it will not be subjected to
extreme temperature changes.
Glow Plug
The glow plug is an item that will wear out and need replacement
from time to time. It is a good idea to remove the glow plug before
your first run, heat it and see how well it glows. You should see a
bright orange glow from the filament. If a coil or two will not glow or
the plug will not glow at all, replace the plug. If the engine quits when
you remove the glow starter, the plug might need to be changed,
although this may be because you are running too rich and need to
screw in your high-speed needle some. Look at the glow plug when
you are running the engine. If you see some bubbles coming from
around the plug, replace the glow plug (copper) gasket, or both the
plug and the gasket. Make sure you have a spare plug or two on
hand every time you run the AquaCraft Pro .15.
Fuel Storage
Fuel can go bad. The main ingredient in model fuel is methanol, which
is basically a form of alcohol. Alcohols can absorb water out of the air, so
keep your fuel jug capped at all times. Store your fuel out of the sunlight
and in a cool place. Bad fuel is one of the most difficult problems to
diagnose in engines. If you have tried everything you can think of to
remedy an engine that is not running correctly, try using some fresh fuel.
Fuel Line
Fuel line is susceptible to pinhole leaks. You cannot see the hole in
the fuel line, but if you see bubbles in the line going to the carburetor,
replace the fuel line. Another symptom of a leak in the fuel line is a
surging engine. The properly tuned engine will surge when the air
bubbles enter the carburetor. It is basically leaning out the mixture.
Overheating
One of the worst things you can do to your engine is overheat it. The
oils that lubricate the engine are carried in the fuel. If your engine is
set too lean, there will not be enough oil in the engine to lubricate
the internal parts and your engine will overheat. This will cause
premature wear in the engine and cause damage.
ENGINE MAINTENANCE
• Use care to avoid touching the propeller anytime the engine is
running. Pay equally close attention to items such as loose
clothing, shirtsleeves, ties, scarves, long hair or anything else that
may become entangled in the spinning propeller. If your fingers,
hands, etc. come in contact with the spinning propeller, you may
be severely injured.
• Because of the speed and mass of R/C boats, they are capable
of inflicting property damage and severe personal injury if a
collision occurs. Never run this engine when the possibility of
collision with people or property exists.
• R/C boats are controlled by radio signals, which are subject to
possible interference from other R/C transmitters, paging
systems or other electrical noise. Before turning your radio on,
make sure no one else in the area is operating a radio on the
same frequency (channel).
• A weakened or loose propeller may disintegrate or be thrown off.
Since propeller tip speeds with powerful engines may exceed 600
feet per second, it must be understood that such a failure can
result in serious injury.
• Model engine fuel is poisonous. Do not allow it to come into
contact with the eyes or mouth. Always store fuel in a clearly
marked container and out of the reach of children.
• Model engine fuel is highly flammable. Keep it away from open
flame, excessive heat, sources of sparks, or anything else that
might ignite it. Do not smoke or allow anyone else to smoke in
close proximity to open fuel. Make sure that fuel lines are in good
condition so that fuel will not leak onto a hot engine causing a fire.
• Never operate your engine in an enclosed space. Model engines,
like automobile engines, exhaust deadly carbon monoxide. Run
your engine only in an open area.
• Model engines generate considerable heat. Do not touch any part
of your engine until it has cooled. Touching the muffler, cylinder
head, or exhaust header may result in a serious burn.
• Use safety glasses when starting or running engines. The propeller
may throw loose material such as sand or gravel into your face.
If the buyer is not prepared to accept the liability associated
with the use of this product, the buyer is advised to return this
engine immediately in new and unused condition to the place
of purchase.
SAFETY PRECAUTIONS