Pro Boat PRB2200 V.2 User Manual
Page 7
7
Section 5: The Dynamite .15 Marine Engine
Water-Cooled Engine
Because the Dynamite
®
15S engine is water-cooled and not air
cooled, make sure that you do not run the engine for an extended
amount of time outside of the water. Continuously monitor the
water outlet when the boat is running to make sure that the water
is reaching the engine head. If the water does not reach the head
to cool it, the engine will overheat and fail. This could cause
permanent damage to the engine.
Pro Mix Carburetor
The Dynamite .15 engine comes equipped with the Dynamite Pro
Mix Carburetor. Each Pro Mix Carburetor is pre-adjusted at the
factory. This setting should be approximately 3
1
⁄
2
turns open for
the high-speed and 2
1
⁄
2
turns open for the low-speed needle.
This should give you a slightly "rich" mixture of fuel to the engine.
This setting is the safest way to break in your engine. For further
details regarding the Pro Mix Carburetor, please consult Section 2
of the Dynamite .15S instruction manual.
Note: When using the pull-starter, never pull the rope out to
its full length as doing so can cause damage and the rope
may not retract. Quick, short pulls of the starter rope are
the best technique to use with the pull-starter.
If the pull-starter becomes very difficult to pull, the engine may be
hydro-locked. Excessive fuel between the head and piston will not
let the piston travel to TDC (Top Dead Center). Loosen the glow
plug one turn and try to start the engine. If the engine starts,
re-tighten the glow plug with the attached glow driver while the
engine is running. If you are still unable to get your engine to
start, refer to the Troubleshooting Guide (page 8) in this manual.
You may have to "blip" the throttle on the transmitter (applying
throttle on/off) while trying to start the engine-new engines are
harder to start because of the tight piston/sleeve fit. Never start
an engine at
1
⁄
2
to full throttle, as this will cause over-revving
which may cause premature wear and breakage.
During the first tank of fuel, advance the idle via the idle adjust-
ment screw more than normal to prevent stalling at idle due to the
rich fuel mixture for break-in.
Breaking in Your Engine
The first start-up of the engine is the most critical moment of the
engine’s life, dictating how the engine will perform from that time
forward. Turn on your radio system and attach a fully charged
glow igniter (DYN1925) to the glow plug. Start the engine with the
recoil (pull-start) on the engine.
During break-in, the low-speed needle should be slightly rich and
the high speed needle should be very rich. After a few tanks of
fuel, begin to lean the engine out. Adjust the high-speed needle
1
⁄
16
of a turn at a time. It generally takes about five to six tanks of
fuel before you want to lean out the engine until it supplies good
power. Do not skip this process of break in. Failure to follow
this procedure could damage your new engine. For further
details on breaking in your engine, please see Section 3 of the
Dynamite .15S instruction manual.
Note: It is common for an ABC engine to go through a glow
plug or two during break-in.
Needle Settings
When adjusting the settings, always adjust the needles in small
increments, about
1
⁄
16
of a full turn at a time. Do not set the engine
too lean, as it shortens the reliability of the engine. Please refer
to Section 4 of the Dynamite .15S instruction manual to learn
more about setting the needle valves.
After you have attained the correct needle settings, the engine will
have a strong sounding, high-pitched whine at full speed, and a
thin trail of blue/white smoke will come from the exhaust.
Idle Adjustment
The last setting to set is the idle screw. To obtain a higher idle,
turn the idle screw clockwise; for lower idle, turn the idle screw
counterclockwise.
Replacement Parts
There is a complete parts listing in the Dynamite .15S instruction
manual in the event that you need to replace an engine part.
Exploded views will help you to select the correct parts and make
minor repairs.
High-Speed
Needle
Valve
Higher
Idle
Idle
Adjustment
Screw
Leaner
Low-Speed
Needle
Valve
Richer