Pro Boat Nitro Starting - Manual (Page 2)

Step 4
The carburetor needles are factory set at 2
1 /
2
turns. After
break-in, you may adjust the needle settings to increase
speed and runtimes. Lean the hi-speed needle (turn
clockwise) until the engine has a strong high-pitched
whine and a thin bluish/white smoke stream emitting from
the exhaust system.
Caution: Do not over-lean the engine or permanent
damage to the engine will occur.
Step 5: .32M Low End Needle Adjustment
Once the high end needle is set, adjust the low end
needle with the supplied screwdriver (Dynamite .32M
only). Turn the needle adjustment clockwise 1/16 of a
turn at a time and operate the throttle. There should be
no hesitation from idle to high speed. Keep adjusting
the needle in until the engine hesitates, then back off the
adjustment 1/4 of a turn.
Step 6
If the engine becomes flooded, it may not turn over due
to this hydro-locked condition. You must remove the
glowplug, invert the boat and operate the starter several
times to evacuate excess fuel in the combustion chamber.
Install the glow plug and attempt to start the engine again
with a slightly leaner high speed needle setting.
If you still have problems starting the engine, see the
troubleshooting guide in the Pro Boat ™ manual.
After break-in, the engine will reward your patience with
easy starting for many years to come.
6761.1
Richer
High-Speed
Needle Valve
Leaner
Low-Speed
Needle Valve
Higher Idle
Idle Adjustment
Screw