Pro Boat PRB2350S - Manual (Page 8)

8
Propeller Trim Angle
You may adjust the propeller strut to add up
or down trim to the propeller by loosening
the propeller strut bolt and sliding the
propeller strut up to increase top-end speed
(but steering response will decrease and
cavitation may occur if excessively adjusted).
Lowering the trim angle will increase handling
performance (but may cause the boat to
over-steer and decrease speed).
Water-Cooled Cylinder
Head and Muffler Cooling
The exhaust system is cooled after the
cylinder head. See photo for proper cooling
line routing. Do not alter the cooling line
routing method.
Problem Possible Solution
Engine will not start Improper needle setting: see Zenoah Engine Manual; baseline
settings are 2 turns out for high-speed, 1 turn out for low-speed
Out of fuel: fill fuel tank
Improper fuel: use fresh Gasoline & Evolution 2-Cycle Oil
(mixed 32 parts gas to 1 part oil)
Bad Spark plug: replace
Flooded engine: remove spark plug, invert boat and operate the
pull-starter to remove fuel
Engine starts, then dies Fuel line blocked or broken: connect or replace fuel line
Reset needles to baseline setting: see Zenoah instructions
Engine starts and runs for Bad fuel: replace
several minutes, then dies Improper needle settings: see Zenoah Engine Manual
Overheated engine: check for clogged or damaged cooling system
Debris in carburetor or filter clunk; disassemble and clean
Section 10:
Handling Adjustments
Section 11: Cooling System
Carburetor
Water-Cooled
Cylinder Head
Line from Head
to Muffler
Line from Head
to Rudder
Section 12: Troubleshooting Guide