Pro Boat PRB2750 - Manual (Page 11)

11
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 electric starter as described in
Section 8.
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. 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 the separate
Dynamite .32 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.
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
In the event that you need to replace an engine
part, there is a complete parts listing in the
Dynamite .32 instruction manual. Exploded views
will help you to select the correct parts and make
minor repairs.
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 theses shims to
increase compression and power.
Maintenance
Lube the gears inside the drive with waterproof
grease every 30 hours of use. Check all screws for
tightness after each run.
Section 10: Starting the Engine (continued)