COOLED HEAD: A feature of this engine is the air cooled
head. This feature does not mean that the engine is to be
run outside of water for prolonged periods of time as the
lower unit does require water for cooling.
LOCK: Care must be taken to avoid hydraulic lock, this
is trapped liquid in the cylinder that can not be compressed
by the piston. This condition is possible by allowing excessive
fuel to flow into the engine while it is not running or when
the engine ingests water if your boat flips. Never bump the
engine with an electric starter before checking for this condition
by turning the engine through 3 revolutions by hand using
the flywheel. BE SURE THE GLOW PLUG LEAD IS NOT ATTACHED.
The fluid will drain out through the exhaust system.
AND LUBRICATING FEATURES: K&B has added two new features
to enhance operating condition and longevity.
hole has been added to the front plate to aid in cleaning
the front or top bearing. Simply place an aerosol can of Liquid
Wrench non-flammable lubricant (or similar product) up to
the hole and back flush the bearing. Continue
to flush the bearing until you see fresh cleaner come out
under the flywheel. The bearing may also be oiled in the same
hole for the flex shaft has been added to the lower unit.
It is recommend that each time, before you run the unit, you
lubricate the cable with a mixture of 50% STP and 50% 20-50
weight oil. K&B still recommends that you continue to
remove, inspect and re-lube the flex cable (using K&B
Lube P/N 8449) on a continued basis.
We recommend after each days running, you run the engine dry
by removing the fuel line while the engine is running at low
speed. This burns out fuel residue that will cause internal
corrosion and rust. After run oil is strongly recommended.
It is also important that you always check each bolt and screw
for tightness before and after a day of running.
For maximum life of propeller shaft bushing do not operate
engine out of the water for a period of longer than thirty
(30) to forty-five (45) seconds.
LOWER END: Tests have proven that the cable drive is far
superior to the gear drive. Maintenance is cut down to a minimum.
However, we ask that you occasionally check and lubricate
the flex cable. Check for excess wear and fraying. Do not
rotate the engine by flipping the propeller in a counter-clockwise
direction. Fraying and unwinding may occur. We recommend a
good silicone base lubricant such as K&B Lube P/N 8449
for your outboard as well as other drive units.
PLUG: This Engine is designed to use the long reach glow
plug (K&B P/N 7311 or 7300).
We recommend using K&B Fuel with 15 to 25% nitro.
For competition nitro content may be increased to 50%.
CLEARANCE: Your engine has been factory set with a head
clearance of approximately .010 to .015.
INSTALLATION: Two 4-40 x 1/4 screws are included
within your accessory package for muffler installation. Simply
slide the muffler through the cutout in the lower unit and
install the screw through the muffler adaptor into the matching
holes on the muffler. Tighten screws to 12 inch pounds.
PROPELLERS: Propellers are naturally an important factor.
Most propellers that are available on the market need balancing
and cleaning up. Unbalanced props cause cracks
on boat hulls, premature wear on the propeller shaft and bushings
and in extreme cases prop shaft breakage. Unbalanced props
also rob your engine of horsepower and your boat of performance.
So, balancing the prop is very important.
up the propeller means to sharpen the leading edges
of the blades and generally sanding, smoothing and polishing
the entire prop as per prop manufacturers instructions.
YOUR OUTBOARD: The outboard is mounted directly to the
transom of your boat. If you are using an adjustable motor
mount, the outboard mounts to the motor mount and it in turn
mounts to the transom.