11
Section 12: Handling Adjustments
Trim Tabs
On smooth water conditions, the trim tabs may be bent up further
or removed to increase top speed performance. Be sure to reinstall
the trim tab mounting bolts to keep water from entering the boat. Be
aware that the boat may become less stable and may “blow over” with
the increased speed.
Propeller Trim Angle
You may also adjust the propeller strut to add up or down trim to the
propeller by loosening the 2 propeller strut bolts and sliding the
propeller strut up to increase top-end speed (but steering response will
decrease). Lowering the trim angle will increase handling performance
(but may cause the boat to over-steer and decrease speed).
Section 13: Cooling System
Water Pump
The water pump is operated from crankcase pressure. Be sure that
water is exiting the 2 water jackets mounted on the left side of the
boat when the engine is running and the boat is in the water. If water
does not stream out of either the exhaust or cylinder head cooling
ports, immediately stop engine operation and remove obstructions in
the lines or replace broken cooling lines.
Hint: To test each cooling line for obstructions or a leak in the cool-
ing system, place a piece of tubing over the water inlet tube in front
of each rudder and blow into the tube. When testing for obstructions
in the cooling system, be sure to isolate each system by pinching the
appropriate water lines.
Water-Cooled Cylinder Head and Exhaust Manifold
Cooling Jacket
The exhaust system is cooled independently from the cylinder head.
See photo for proper cooling line routing. Do not alter the cooling line
routing method.
Water Outlet
Tuned Pipe
Tuned Pipe
Water-Cooled
Cylinder Head
Water Pump
Water Outlet
Zenoah
®
G26M Engine
Tuned Pipe Fitting
Carburetor
Mounting Plate
Rudder
Rudder
Pick-Up
Pick-Up
Tube
Tube
Rudder
Rudder
Pick-Up
Pick-Up
Tube
Tube
Water-Cooled
Cylinder Head
Water Pump
Carburetor
Tuned Pipe Fitting
