Arrow Shark X-Hydro Instruction Manual Download Page 19

For "hot re­starts" you may not need to choke the engine. Check that the fuel line is full of gas 
without any bubbles and smartly pull the starter rope. If the engine doesn't start after a few pulls, 
then manually choke the engine as above and slowly pull the starter rope until you can feel fuel 
wetting  your  thumb  or  finger  before  removing  it  from  the  carb  venturi.  Slowly  pull  the  starter 
one more time to check the engine is clear, and then pull smartly until the engine starts. 

Never  run  the  engine  with  the  boat  on  its  stand  for  more  than  a  minute  or  so  without  water 
circulating through the cooling system. This is long enough to start the engine and to check the 
idle  as  above,  or  when  preparing  to  launch  the  boat  in  the  water. To run  the  engine  for  longer 
with the boat on its stand, you need to arrange a supply of water. One way to do this is to make 
or adapt a fitting for your garden hose with two nipples or outlets over which you can slide the 
water  lines  from  the  rudder  and  transom  pick­up.  Simply  remove  the  lines  from  those  fittings, 
connect  them  to  your  garden  hose  adapter  and  turn  on  the  hose  at  low  pressure  so  that  water 
flows  freely through the outlets on  your boat. Be careful to keep the lines and hose away  from 
your  prop  ­ although  you  should  keep  the  engine  revs  low  enough  not  to  actuate the  clutch  as 
much as possible. 

For more information on the engine break­in procedure, carburetor setting, performance tips and 
engine maintenance, please read the separate XP254M engine manual that comes with this boat. 

Step 12: Stopping The Engine 

For  safety  purpose,  your  boat  comes  equipped  with  a  kill 
switch  that  will  instantly  stop  the  engine.  Simply  press  the 
button  and  hold  it  momentarily  until  the  engine  stops. 
However,  you  should  also  set  your  throttle  linkage  so  that 
you can stop the engine by pushing the transmitter trigger. 

Note:  When  bringing  your  boat  back  to the  shore  after  each  run,  judge  the  distance 
correctly  and  push  the  transmitter  trigger  to  stop  the  engine  so  that  the  boat  glides 
safely to a stop before hitting the shore. 
Note: Before running for the first time each day, check that your "Fail Safe" stops the 
engine correctly.  With the boat on its field stand and the engine running at idle, turn 
off your transmitter. The Fail Safe should immediately close the throttle and stop the 
engine. Your radio or Fail Safe device will have instructions on how to set this up. 

Step 13: Launching And Running Your Boat 

* Before the first run each day: 
a) Carefully check over the boat as explained in previous steps to ensure nothing is loose and that 
all the cooling lines are correctly attached.

Summary of Contents for X-Hydro

Page 1: ...he radio manufacturer to ensure you will be able to maintain control of your boat at your planned maximum operating distance Always fit a Fail Safe device so that your engine is stopped should the rad...

Page 2: ...rom other boats and with your more experienced driver close by to give advice and support If you don t know an experienced driver find an RC Boat Club in your area and join up Most clubs welcome new m...

Page 3: ...Servo for rudder operation 8 CNC Dual Servo Mount and Bolts 9 Prop Nut 10 Receiver Switch Cover 11 Antenna Tube with Black Cap 12 Shaft Drive Dog Tools Required You will need the following tools and...

Page 4: ...d apply CA glue or epoxy to the joints of the stand Note This boat stand is intended for displaying your boat at your home or office It is not for field use You should custom make a stronger boat stan...

Page 5: ...e on the top of the rudder blade Step 4 Turn Fin Installation And Performance Tip A curved hydro turn fin is supplied in the accessory bag along with mounting bolts and nuts On the back of the starboa...

Page 6: ...aft that comes with the package has been pre greased and pre cut to the right length to fit your boat It is best though to re grease the shaft with light weight marine grease before you insert it into...

Page 7: ...h out and draw back a bit taking the flex shaft with it If there is no free space left on the prop shaft when the clutch bell draws back it will create a strain on the flex shaft that could cause it t...

Page 8: ...pply a little Loctite to the thread on the end of the shaft and screw the prop nut onto the prop shaft Use an Allen key or similar small diameter metal rod through the hole in the nut to tighten it in...

Page 9: ...r boat in different water conditions To start with run a straight edge along the bottom of the boat projecting out the back and set the strut drive unit so the prop shaft is parallel with the straight...

Page 10: ...change the pipe length and find your engine no longer performs properly just re set the pipe to its original factory setting Step 8 Servo Installation Please note that we do not include radio systems...

Page 11: ...an experienced driver for advice if you are not sure on this point Note Before proceeding to install the servos into the boat connect them to your receiver along with a battery and switch Turn on your...

Page 12: ...box Install both servos into the CNC servo mount using the screws provided The servos must be mounted so that the spindles for the arms are in the center as shown in the above left photo and the suppl...

Page 13: ...cing up when installed into the servo box Fit the CNC servo mount and servos into the servo box remember that the 15kg metal gear servo goes at the back of the box Connect both throttle and steering p...

Page 14: ...s to the correct positions in the receiver Neatly arrange and secure the wires with a zip tie Note A 5 cell inline rechargeable battery is required for this application Check that the radio and servos...

Page 15: ...is especially beneficial during long high speed runs Fill the cup with a good quality lubricating oil you can use the same oil that you use to mix the gas Trimming Your Throttle Function Adjust the pu...

Page 16: ...er Note We recommend using the EPA function on your radio to set the rudder so that it turns about 20 25 degrees either way for both left and right turning This will give reliable and stable turns at...

Page 17: ...r outlet from the pipe out of the boat Line 7 Water outlet from the nipple on the engine cylinder under the exhaust flange to flange Line 8 Water outlet from flange out of boat Step 10 Starting The En...

Page 18: ...t when the transmitter trigger is at its neutral position You may find it best to increase the servo trim setting for a slightly faster idle when the engine is cold then return the trim to its normal...

Page 19: ...he lines and hose away from your prop although you should keep the engine revs low enough not to actuate the clutch as much as possible For more information on the engine break in procedure carburetor...

Page 20: ...alled boat and gently pull on the line to bring back the boat If in doubt about rescue methods check with your local RC Boat Club Fill the gas tank and start the engine as explained earlier Wait a few...

Page 21: ...cumstances one day will result in the boat turning over despite your best efforts to avoid it Retrieve the boat with your rescue method inflatable dinghy tennis ball on a line or other method Note Be...

Page 22: ...similar Keep the shaft out of the boat until you next run it this allows the inside of the stuffing tube to dry out Remember to re grease the shaft when preparing to next run the boat Spray all over...

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