CLEANING 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 (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 manner.
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 Lube P/N
8449) on a continued basis.
We recommend after each days running, that you check
each bolt and screw for tightness.
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 marine grease
(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).
We recommend using K&B 525 (25% nitro) or K&B
Speed Fuel 550 (50% nitro).
An ABC type engine, (Aluminum, Brass, Chrome)
does not require prolonged break-in periods. However, we do
recommend that you run the engine at a slightly rich needle
valve setting for the first two runs. These runs should be
made with the engine installed on the boat and running in
the water for periods of not less than five (5) minutes each.
Typically, an engine will be ready for continuous full throttle
and a leaner needle valve setting after ten (10) to fifteen
(15) minutes of running.
If the engine is run at a lean needle valve setting
during the break-in period, the following may result.
and sleeve will overheat and score.
connecting rod, crankshaft and wrist pin will overheat from
lack of lubricant and seize, causing the lower con-rod bushing
to spin in the con-rod, or in extreme cases, the bottom of
the con-rod will break, causing damage to the crankcase, piston
crankshaft may seize inside the front plate and fracture.
ENGINE: The engine runs in a clockwise rotation. Make
certain that your starter motor is running in the same direction.
With the tank full of fuel, radio on and glow plug battery
leads off, fully open the carburetor, and with your finger
covering the carburetor venturi, spin the engine with the
starter for about a two second burst. This primes the engine.
Now close the carburetor to the starting position. Connect
the GLOW battery and spin the engine again. The engine should
fire up and run. We recommend that you start your engine close
to the water so that you will not have too far to walk with
the engine running, with no water circulating through the
cylinder head. It is also advised that you keep the engine
at a slow or not greater than a slightly fast idle until you
get into the water, as over revving plus overheating can damage
RECOMMENDATIONS: We recommend that you use a fuel filter
in your fuel system. Install the fuel filter on the fuel pickup
tubing between the tank and carburetor. It will keep foreign
matter from going into the carburetor to create clogging.
However, the filter also can clog up. Therefore, should it
clog, remove the filter from the fuel line and clean it as
per the manufacturers instructions.
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, not
to mention robbing your engine of horse power 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.