User Manual

Congratulations on your purchase of a Dynamite
®
.32
Marine engine! Precision manufactured and assembled,
your Dynamite .32 Marine engine will provide you with
trouble-free performance if you read and follow these
instructions.
Using the Proper Fuel and Glow Plug
Using the proper fuel and glow plug is critical in order to
achieve maximum performance and reliability. You must use
fuel and glow plugs that are specifically designed for model
car/boat applications.
Never use any type of model
airplane glow fuel!
Use of model airplane fuel will
damage your engine and immediately void any warranty.
We recommend using Blue Thunder™ or Blue Thunder
Race Formula blend fuels with 20% nitro, providing the
best combination of power and fuel economy. Dynamite
®
Blue Thunder Fuels are vigorously tested, researched
and formulated to deliver excellent power as well as
engine protection.
A glow plug has been included and is ideal for breaking in
your new engine. In fact during the break-in procedure, it is
not uncommon to go through one or two glow plugs, as
microscopic bits of metal (from the cylinder/piston wearing
in) bond themselves to the plug element causing glow plug
failure. We recommend a sport glow plug (DYN2500) or an
O’Donnell
1
/10 racing glow plug (DYN2521) as the absolute
best glow plug for this engine, delivering an ideal balance
of performance and longevity.
Carburetor Adjustments
Your Dynamite .32 Marine engine comes equipped with a
precision rotary carburetor. Take a moment to review
the pictures below to familiarize yourself with the various
functions of the carb. Loosening the nut located on the
side of the crankcase under the carburetor body will allow
you to rotate the carburetor. Make certain to mount the
throttle arm to the side required by your particular boat.
Although preset at the factory, some changes in the
needle setting can occur during shipping and handling.
We suggest the following settings for breaking in
your engine:
High-Speed Needle: 2
1
/2 turns out (counterclockwise)
from closed.
Low-Speed Needle: 2
1
/2 turns out (counterclockwise)
from closed.
When checking the adjustment of the low-speed
needle, it is crucial that the throttle barrel is
closed completely when turning the needle
and that you do not overtighten the needle.
Use the included screwdriver to make this job
easier. When you feel resistance in the needle,
immediately stop turning and begin turning the
needles counterclockwise, counting the number
of turns from “closed.”
Water-Cooled Engine
Because the Dynamite
®
.32 Marine 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 will cause
permanent damage to the engine.
Starting Your Engine for the First Time
The Dynamite .32 Marine engine comes equipped with
the Dynamite Pro Mix Carburetor. Each Pro Mix
Carburetor is pre-adjusted at the factory. This setting
should be approximately 2
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.
The first start of your engine is the most critical time of
the engine’s life, dictating how well it will perform. After
installing the engine in your model and inserting the glow
plug, turn on your radio system and attach a glow igniter
to the glow plug.
When using a recoil starter, never pull the rope
out to its full length, as doing so may cause
damage and recoil starter failure. Quick, short
pulls of the recoil starter are the best technique
to use. Never extend the starter rope more than
12 inches.
Should the pull starter be extremely difficult to pull (will
not extend out of the assembly), the engine may be flood-
ed (hydro-locked). Excess fuel between the cylinder head
and piston will not allow the piston to travel through its
full range of compression, effectively “locking up” the
engine. Should this occur, immediately remove the glow
igniter from the plug. Using a glow plug wrench
(DYN2510), remove the glow plug and turn the model
upside down. Give the recoil starter a few short pulls to
clear out the fuel, re-install the glow plug and start again.
You may need to “blip” the throttle on the transmitter
(applying throttle on/off) while trying to start the engine,
as new engines are more difficult to start due to the tight
piston/cylinder fit.
Never start an engine above
1
⁄4 throttle! Immediate damage to your engine
can occur!
When the engine starts, the exhaust should emit
blue/ white smoke, indicating that the engine is exces-
sively rich (a good thing during break-in). During the
first tank of fuel, you may wish to set a higher than
normal idle speed and/or leave the glow plug igniter
attached in order to keep the engine from stalling. Drive
the boat around while “blipping” the throttle and avoid
operating the engine at full throttle for more than 2–3
seconds at a time. Consume the entire first two
tanks of fuel in this manner.
After the first two tanks of fuel, begin leaning out the
high-speed needle valve
1
/8 turn at a time. It generally
takes about 5 or 6 tanks of fuel before you’d want to start
tuning for “maximum” power.
Do not skip this
process of breaking in a new or rebuilt engine!
Should you choose not to follow these procedures,
you risk damaging your engine during the first
tank of fuel.
Your patience during these procedures will be rewarded
by an engine that performs reliably and to its maximum
power potential. First run attempts can be more frustrating
than with other (less powerful) sport engines, so take
your time—it will be worth the wait!
Glow plug failure is a common occurrence when breaking
in a new engine. To test your plug, let the engine idle at
a properly adjusted low-speed needle setting with the
glow igniter attached. Then, remove the igniter. If you hear
no appreciable change in engine rpm, then the plug is
still good. If the engine loads up and the rpm’s decrease,
it’s time to replace the glow plug.
Setting the Needle Valves
When adjusting the settings, always adjust the needles in
small increments, about
1
/8 of a full turn at a time.
Do not set the engine too lean, as it shortens the
reliability of the engine.
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.
An engine should not be run too lean; doing so severely
shortens the life of the engine. When an engine is set too
lean, it will run very strong at first, but will soon begin to
sag and hesitate or stall when accelerating.
Tuning the Low-Speed Needle
The low-speed needle (also referred to as the idle mixture
or idle needle) should be set after you’re satisfied with
the high-speed needle setting. After achieving the proper
operating temperature, reduce the engine throttle to idle
and pinch the fuel line with your fingers close to the carb
fuel inlet nipple. If the engine dies immediately, the low-
speed needle is set too lean. If the rpm’s increase dramat-
ically, the setting is too rich. The ideal setting results in
the rpm’s increasing just a slight amount after pinching
the fuel line.
Idle Stop Adjustment
The last setting to be made is the idle stop screw. Turning
this screw clockwise increases the idle speed; whereas
turning the screw counterclockwise will make the engine
idle at a lower speed. Ideally, the engine should idle just
fast enough to be reliable in acceleration and transition
from idle to full speed.
Head Shims
Several head shims are added at the factory to make the
engine easier to start when new. After break-in, you may
remove all but one of these shims to increase compres-
sion and power.
.32 Marine
Owner’s Manual
Leaner
Low-Speed
Needle Valve
High-Speed
Needle Valve
Idle Stop
Screw
Fuel Inlet
(Adjustable)
Faster Idle
(clockwise)
Slower Idle
(counterclockwise)
Leaner