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Congratulations on the purchase of your Pro Boat™ ThunderCat™ 31 Catamaran. You are just minutes 
from one of the most thrilling experiences that the radio control hobby has to offer.
The Pro Boat ThunderCat 31 is a professionally built, ready-to-run Catamaran fiberglass composite model. 
Powered by the potent Dynamite® .32 marine engine, you will be able to race across the water at scale 
speeds in excess of 300mph! 
Read this owner’s manual thoroughly. You also need to read the included Dynamite .32 engine manual, along 
with the Pro Boat radio system manual. 
It is very important that you operate this boat responsibly. With proper care and maintenance, you will be 
able to enjoy your ThunderCat 31 for many years to come.
Carefully unpack ThunderCat 31 and examine the boat and its contents. The box should contain the 
ThunderCat 31 RTR with radio installed, a boat stand, and the Pro Boat radio transmitter. If you are missing 
any of these items or notice any damage, immediately contact the place of purchase.

This boat is not a toy! It is a high performance RC model boat. Do not take risks that could endanger you 
or others.
Before operating your model, make sure your frequency is clear. If someone else is operating on the same 
frequency, both models could go out of control, possibly causing damage to the models, as well as to others.
Be certain to check all of the hardware, exhaust system, and propeller, making sure that all are secure 
before and after each run.
Always stay clear of the propeller when the engine is running!
When you first begin to run your ThunderCat 31, place it in the water with the engine running at 
approximately 1⁄8 throttle. Slowly increase throttle until boat accelerates onto plane. Gradually increase 
throttle to no more than 1⁄2 until you become more familiar with the boat.
When operating this model, stay clear of people, full-sized boats, stationary objects, and wildlife. Also, 
watch out for fishing lines that could get tangled in the propeller. It is preferable to operate the Pro Boat 
ThunderCat 31 in low wake, low wind conditions. We also suggest that you do not run the ThunderCat 31 
in salt water. If at any time while operating your ThunderCat 31 you sense any abnormal function, end your 
operation immediately. Do not operate your ThunderCat 31 again until you are certain the problem has 
been corrected.
Service Center Information
If you have any questions regarding the Pro Boat ThunderCat 31, please contact the Horizon Service 
Center:

Horizon Service Center 

4105 Fieldstone Rd. 

Champaign, IL 61822 

(877) 504-0233

Introduction

Warning

Summary of Contents for ThunderCat 31

Page 1: ...5mm Beam 11 5 in 287mm Engine DYN 32 Marine w Tiger Drive and Tuned Exhaust Radio System Pro Boat AM 27MHz Weight 6 3 lb 2 8 kg Fuel Tank Capacity 12 oz 0 35 liter ThunderCat 31 Assembly Manual 32 Siz...

Page 2: ...ear If someone else is operating on the same frequency both models could go out of control possibly causing damage to the models as well as to others Be certain to check all of the hardware exhaust sy...

Page 3: ...32 Marine Engine 9 Section 10 Starting the Engine 10 Section 11 Troubleshooting Guide 12 Section 12 Maintenance 12 Section 13 ThunderCat 31 Replacement Parts 14 Section 14 Appendix 15 Engine Tuning Sc...

Page 4: ...ser accepts all resulting liability All warranty questions should be directed to Horizon Hobby Inc Please do not contact your local hobby shop regarding warranty issues This will enable Horizon to bet...

Page 5: ...he short plywood pieces Repeat with the remaining short plywood pieces 3 Secure the interlocking boat stand with thick CA or Epoxy Parts Needed Rudder and 2 5mm hex screw 1 Locate the stainless steel...

Page 6: ...e dry cell battery holder Install 4 AA alkaline batteries as shown Note the proper polarity Wrap the battery box in foam 4 Re install the battery holder into the radio box and and secure the radio box...

Page 7: ...tter 3 Note the proper polarity and insert 8 AA batteries into the transmitter 3 Secure the batteries using the battery cover 4 Turn on the radio and confirm that all LEDs illuminate indicating proper...

Page 8: ...and re installed the lid wipe away any excess fuel that may have spilled inside the hull or elsewhere on the boat Immediately seal the fuel container by putting the lid back on after refueling in ord...

Page 9: ...ing through the engine head If the water does not reach the head to cool it the engine will overheat and fail This will cause permanent damage to the engine Carburetor High Speed Needle Valve Faster I...

Page 10: ...dition as serious engine damage may occur if operation is continued Remove the glow plug invert the boat and operate starter to remove raw fuel before resuming normal operation You may have to blip th...

Page 11: ...usting the settings always adjust the needles in small increments about 1 16 of a full turn at a time Do not set the engine too lean as it shortens the reliability of the engine After you have attaine...

Page 12: ...per glow plug install proper glow plug Glow igniter not charged charge igniter Dead glow plug replace Flooded engine remove glow plug invert boat and engage the Tiger Drive to remove raw fuel from the...

Page 13: ...ortant so that when you have finished lubricating the drive shaft you can correctly re install the drive shaft Loosen do not remove the retaining nut by holding the collet with a 17mm wrench and unscr...

Page 14: ...ut TC31 PRB2072 Exhaust Coupler TC31 PRB2073 Rubber Boot 2 TC31 PRB2075 Antenna Tube TC31 PRB2079 Collet TC31 PRB2080 Teflon Liner TC31 PRB2083 Cockpit Bolt TC31 PRAB215 Propeller 1 60 x 2 5 Bronze TC...

Page 15: ...15 Section 14 Appendix Engine compartment and components Transom and components Engine water cooling lines...

Page 16: ...8379 2006 Horizon Hobby Inc 4105 Fieldstone Road Champaign Illinois 61822 877 504 0233 www horizonhobby com Printed in China...

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