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PREPARING TO OPERATE YOUR RIO 51
SPARK PLUG
The recommended spark plug is a NGK CMR6A (FJIG7475).
To avoid possible engine damage, do not use any other
type of spark plugs. The plug gap should be .025" to .030”.
If the plug gap is incorrect, adjust it with a spark plug
gapping tool. This spark plug uses a 5/8” [16mm] spark
plug wrench to remove and install the plug.
GASOLINE
Your Fuji-Imvac BT-28M engine requires a 32:1 gasoline
to 2-cycle oil mix ratio for best engine performance and
sustained engine life.
Follow the mixing direction on the oil container. Always
use high-quality oil intended for 2-cycle engines. Prepare
only the amount of gasoline oil mix needed. Aged gasoline
could damage the engine and cause it to overheat. We
fi nd that gasoline mix over 3 months should be discarded
and replaced.
Use only low octane, alcohol-free gasoline. The carburetor
diaphragm will gradually deteriorate if you use gasoline with
alcohol. You will need to replace the diaphragm after about
80 hours of operation if you use gasoline with alcohol.
Gasoline can go bad. Store your gasoline out of the
sunlight and in a cool place. Bad gasoline is one of the
most diffi cult 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 gas/oil mix.
BREAKING IN THE ENGINE
To ensure long life and good performance from your
Fuji-Imvac BT-28M Marine engine, you MUST break it in
properly. To break-in your BT-28M Marine, you need to
run the boat for about an hour with a rich needle setting.
Patience is important here; the boat will run slowly during
the break-in process and the engine’s output power will
increase gradually over the fi rst few tanks.
Note:
Please do
not use a hanging I-V bag style water cooling system for
breaking in your engine. It is best to get the boat on the
water running to break in your engine.
Do not run at full power (full throttle) for extended periods
of time while breaking in your engine. It’s best to break in
the engine using a variety of throttle settings.
Make sure that the engine has adequate cooling. With the
boat in motion, look at the port side of the boat for water
spraying out the cooling exit. It’s a good idea to get in the
habit of looking for water exiting the cooling exit each and
every lap.
THE FOLLOWING TOOLS ARE REQUIRED (NOT INCLUDED)
TO ASSEMBLE AND INSTALL THE BATTERIES IN YOUR RIO 51
❏
5.5mm Nut Driver (HCAR1112)
❏
7mm Nut Driver (HCAR1116)
❏
3mm Hex Driver (HCAR1156)
❏
#2 Phillips Screwdriver (HCAR1024)
❏
#2 Slotted Screwdriver (HCAR1002)
❏
10mm Wrench
NECESSARY COMPONENTS FOR OPERATING YOUR RIO 51
❏
Small personal retrieval system. This might be as simple
as a tennis ball tied to the end of a fi shing reel, or a
fully equipped AquaCraft Hammer EP RTR (AQUB10**)
towing a tennis ball behind a 10 foot line. Better yet,
use a small Jon boat and personal fl otation device (PFD,
preferred!) so you can row out and properly retrieve
your boat.
❏
Good friend or buddy to help you start and launch the
boat. Besides, R/C boating is the most fun when you
have a friend with you.
❏
12 “AA” batteries
❏
Approved one gallon gasoline fuel can (with standard
pump gas)
❏
2-cycle oil
❏
Graduated mixing cups (GPMR8056)
❏
Small funnel
❏
GrimRacer
™
50 weight cable oil (AQUB9550)
❏
GrimRacer Speed Grease drive cable lubricant (AQUB9500)
EXTRA SUPPLIES YOU MIGHT WANT TO HAVE WITH YOU
DURING THE OPERATION OF YOUR RIO 51
As with any hobby, it is a good idea to assemble a useful
collection of tools and accessories to bring along when
you head out to the pond. Here are some items you will
want to keep handy:
❏
Extra “AA” Batteries
❏
RX Balloons (AQUB9504)
❏
Threadlocking Compound (GPMR6060)
❏
Pliers (HCAR0625)
❏
Hobby Knife (HCAR0109)
❏
Metric hex wrench set (HCAR0521)
❏
Stubby Metric hex wrench set
❏
5/8 [16mm] inch spark plug wrench
OTHER USEFUL ITEMS TO HAVE ON HAND:
❏
Hobbico Duster
™
compressed air (HCAR5500)
❏
Waders or rubber boots
❏
Paper Towels
❏
Spray-On Cleaner
❏
Sunglasses
❏
Sunblock
❏
Folding table
❏
Lawn chairs
❏
First-Aid kit
❏
Cooler with plenty of ice and soda
❏
Canopy or shelter
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