Note: For your first runs we recommend that you set the throttle butterfly to open no
more than about 3/4 of the way rather than fully open even when your transmitter
trigger is at its full speed position. This will help you correctly runin your high
performance XP254M engine. After having set up the throttle linkage as described
above, use the "EPA" function in your transmitter to restrict the throttle from opening
more than 3/4 of its full movement. After the engine has been fully runin, you can
reset the "EPA" for the throttle butterfly to fully open for top speed.
Trimming Your Steering Function
Similarly, you need to adjust your steering linkage via the
pushrod connector to obtain the correct rudder operation. First
make sure your steering servo is in its neutral position, then
adjust the length of the pushrod so that the rudder is centered.
If necessary, cut the pushrod shorter.
Note: We recommend using the "EPA" function on your radio to set the rudder so that
it turns about 2025 degrees either way for both left and right turning. This will give
reliable and stable turns at high speed.
Connection Check
Before you start the engine, please check all connections and
ensure they are fully tightened and secured. If any of them are
loose, it might cause the boat to operate incorrectly. In
particular, check the engine mount bolts, the rudder blade
bolts, both throttle and steering pushrod connectors, the prop
nut, exhaust bolts and the clutch system bolts. Before running
and between runs, frequently check that the flex shaft collet is
tight otherwise the shaft could fly out of the collet at high
engine rpm and cause damage.
Water Cooling Line Check
Lack of cooling water can quickly cause the engine to overheat
and be damaged. Always watch for leaks in the cooling
system. Become familiar with the cooling system as shown in
the following diagram and confirm that all the water lines are
correctly connected before starting your engine.
XHydro Cooling Line Diagram
