Pro Boat PRB2500 - Manual (Page 7)

Section 5: The Dynamite .15 Marine Engine (cont.)
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 is to set 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.
7
Troubleshooting Guide
Problem Possible Solution
Engine will not start Check needles and make changes back to factory settings if necessary
Improper needle setting
Out of fuel
Improper fuel
Improper glow plug
Glow igniter not charged
Dead glow plug
Flooded engine
Engine starts, then dies Pressure line blocked or unhooked
Reset needles to baseline setting
Improper needle settings
Engine starts and runs for Bad glow plug
several minutes, then dies Idle speed set too low
Improper needle settings
Overheated engine
Glow plug failed due to lean engine setting