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Congratulations on the purchase of your  
Pro Boat

 Formula Hydro. This is a 1/8-scale 

replica of the world famous full-scale hydro. You 
are just minutes from one of the most thrilling 
experiences the radio control hobby has to offer.

The Pro Boat Formula Hydro is a professionally 
built, ready-to-run, 1/8-scale fiberglass model of 
one of the most competitive race boats on the 
Unlimited Hydroplane tour. Powered by the potent 
Zenoah

®

 G26M engine, you will be able to race 

across the water at speeds in excess of 35 mph!

It is very important that you operate this boat 
responsibly. With proper care and maintenance, 

you will be able to enjoy your Formula Hydro for 
many years to come.

Carefully unpack your Formula Hydro and examine 
the boat and its contents. The box should contain 
the Formula Hydro RTR with radio installed, a boat 
stand, and the JR

®

 XR3i radio transmitter. If you are 

missing any of these items or notice any damage, 
immediately contact the place of purchase.

Read this owner’s manual thoroughly. You also need 
to read the included Zenoah G26M engine manual, 
along with the JR XR3i pistol-grip radio system 
manual.

Warranty Period

Exclusive Warranty- Horizon Hobby, Inc., (Horizon) 
warranties that the Products purchased (the 
"Product") will be free from defects in materials 
and workmanship at the date of purchase by the 
Purchaser.

Limited Warranty

(a) This warranty is limited to the original Purchaser 
("Purchaser") and is not transferable. REPAIR OR 
REPLACEMENT AS PROVIDED UNDER THIS 
WARRANTY IS THE EXCLUSIVE REMEDY OF 
THE PURCHASER. This warranty covers only those 
Products purchased from an authorized Horizon 
dealer. Third party transactions are not covered 
by this warranty. Proof of purchase is required for 
warranty claims. Further, Horizon reserves the right 
to change or modify this warranty without notice 
and disclaims all other warranties, express  
or implied.

(b) Limitations- HORIZON MAKES NO 
WARRANTY OR REPRESENTATION, EXPRESS 
OR IMPLIED, ABOUT NON-INFRINGEMENT, 
MERCHANTABILITY OR FITNESS FOR A 
PARTICULAR PURPOSE OF THE PRODUCT. 
THE PURCHASER ACKNOWLEDGES THAT 
THEY ALONE HAVE DETERMINED THAT 
THE PRODUCT WILL SUITABLY MEET THE 
REQUIREMENTS OF THE PURCHASER’S 
INTENDED USE.

(c) Purchaser Remedy- Horizon's sole obligation 
hereunder shall be that Horizon will, at its option, 
(i) repair or (ii) replace, any Product determined by 
Horizon to be defective. In the event of a defect, 
these are the Purchaser's exclusive remedies. 
Horizon reserves the right to inspect any and all 
equipment involved in a warranty claim. Repair or 
replacement decisions are at the sole discretion of 
Horizon. This warranty does not cover cosmetic 
damage or damage due to acts of God, accident, 
misuse, abuse, negligence, commercial use, or 
modification of or to any part of the Product. This 
warranty does not cover damage due to improper 
installation, operation, maintenance, or attempted 
repair by anyone other than Horizon. Return of any 

goods by Purchaser must be approved in writing by 
Horizon before shipment.

Damage Limits

HORIZON SHALL NOT BE LIABLE FOR SPECIAL, 
INDIRECT OR CONSEQUENTIAL DAMAGES, 
LOSS OF PROFITS OR PRODUCTION OR 
COMMERCIAL LOSS IN ANY WAY CONNECTED 
WITH THE PRODUCT, WHETHER SUCH 
CLAIM IS BASED IN CONTRACT, WARRANTY, 
NEGLIGENCE, OR STRICT LIABILITY. Further, in 
no event shall the liability of Horizon exceed the 
individual price of the Product on which liability 
is asserted. As Horizon has no control over use, 
setup, final assembly, modification or misuse, no 
liability shall be assumed nor accepted for any 
resulting damage or injury. By the act of use, setup 
or assembly, the user accepts all resulting liability.

If you as the Purchaser or user are not prepared to 
accept the liability associated with the use of this 
Product, you are advised to return this Product 
immediately in new and unused condition to the 
place of purchase.

Law: These Terms are governed by Illinois law 
(without regard to conflict of law principals).

Safety Precautions

This is a sophisticated hobby Product and not a 
toy. It must be operated with caution and common 
sense and requires some basic mechanical ability. 
Failure to operate this Product in a safe and 
responsible manner could result in injury or damage 
to the Product or other property. This Product 
is not intended for use by children without direct 
adult supervision. The Product manual contains 
instructions for safety, operation and maintenance. 
It is essential to read and follow all the instructions 
and warnings in the manual, prior to assembly, setup 
or use, in order to operate correctly and avoid 
damage or injury.

Table of Contents

Limited Warranty & Limits of Liability .................................................................................................................... 3
Additional Required Items ......................................................................................................................................... 6
Suggested Field Equipment and Supplies ................................................................................................................ 6
Contents ........................................................................................................................................................................ 6
Section 1: Building the Boat Stand ........................................................................................................................... 7
Section 2: Attaching the Turn Fin .............................................................................................................................. 7
Section 3: Removing the Canopy ............................................................................................................................. 8
Section 4: Installing the Radio System Batteries ................................................................................................... 8
Section 5: Installing the Rudder ..............................................................................................................................10
Section 6: Propeller Balancing .................................................................................................................................10
Section 7: Filling the Fuel Tank ................................................................................................................................11
Section 8: Fuel/Oil Mixture ......................................................................................................................................11
Section 9: Range Check the XR3i Radio System ...............................................................................................11
Section 10: Starting the Engine ...............................................................................................................................12
Section 11: Initial Launch of the Formula Hydro ...............................................................................................13
Section 12: Stopping the Engine .............................................................................................................................13
Section 13: Cooling System .....................................................................................................................................14
Section 14: Clutch ......................................................................................................................................................15
Section 15: Troubleshooting Guide ........................................................................................................................16
Section 16: Hull Care ................................................................................................................................................16
Section 17: Maintenance ...........................................................................................................................................16
Section 18: Replacement Parts ...............................................................................................................................18
Appendix ......................................................................................................................................................................19

Introduction

Limited Warranty & Limits of Liability

Summary of Contents for 1/8-Scale Formula Hydro Unlimited Hydroplane

Page 1: ... Hydroplane Owner s Manual Specifications Length 45 25 in 1131 3mm Beam 23 75 in 593 8mm Engine Zenoah G26M and Tuned Exhaust Speed 35 mph Radio System JR XR3i FM 75MHz Officially Licensed replica of the 2006 ABRA High Points Champion ...

Page 2: ... This warranty does not cover cosmetic damage or damage due to acts of God accident misuse abuse negligence commercial use or modification of or to any part of the Product This warranty does not cover damage due to improper installation operation maintenance or attempted repair by anyone other than Horizon Return of any goods by Purchaser must be approved in writing by Horizon before shipment Dama...

Page 3: ...Center 4105 Fieldstone Road Champaign Illinois 61822 All other Products requiring warranty inspection or repair should be shipped to the following address Horizon Product Support 4105 Fieldstone Road Champaign Illinois 61822 Please call 877 504 0233 with any questions or concerns regarding this product or warranty Limited Warranty Limits of Liability cont Safety Precautions and Warnings As the use...

Page 4: ...p to keep the screws secured to the blind nuts within the sponson q 5 Carefully attach the turn fin onto the right sponson as shown and tighten the hex screws with a 3mm hex driver Section 1 Building the Boat Stand Section 2 Attaching the Turn Fin Additional Required Items Suggested Field Equipment and Supplies Contents Although the Formula Hydro comes fully assembled and ready for action you will...

Page 5: ...he transmitter q 3 Insert 8 AA alkaline batteries into the battery holder Note proper polarity q 4 Insert the battery holder in the transmitter following the directions provided with the radio system q 5 Install the battery cover back into position on the bottom of the transmitter q 6 Turn on the transmitter and confirm that the LCD illuminates indicating proper installation of fully charged batte...

Page 6: ...and fill the fuel tank with the gasoline and oil mixture Use a funnel to prevent spills If you do spill be certain to immediately wipe it up with a clean towel Important Range check your radio system before the first run of the Formula Hydro to make certain it is functioning correctly Make sure that the receiver antenna is extended properly q 1 With the boat in its stand the radio system turned on...

Page 7: ...r or engine damage will result Carefully place the boat in the water as soon as possible after the engine has been started Section 10 Starting the Engine 13 With the transmitter antenna up maneuver the Formula Hydro in an oval turning only to the right at slow to medium speeds Make certain that the boat and radio system are functioning correctly As you are running the Formula Hydro in an oval watc...

Page 8: ...e 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 line drawings for proper cooling line routing Do not alter the cooling line routing method Section 13 Cooling System Zenoah G26M Engine Carburetor Insulator Plate Water Cooled Cylinder Head Tuned Pipe M...

Page 9: ...ad 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 remove clean and replace The hull of the Formula Hydro is finished using the highest quality paints and the most advanced painting methods available The base coat clear cote technique delivers an amazing shine that is as dura...

Page 10: ...0 Servo Pushrod Set PRB2561 Cover for Radio Box PRB2562 Flex Shaft PRB2266 Teflon Liner PRB2281 Prop Drive Dog PRB2283 Prop Strut PRB2282 Prop Shaft PRB2252 Rudder PRB2254 Turn Fin with Hardware PRB2259 Pipe Mount PRB2563 Tuned Pipe PRB2278 Cockpit Nuts 2 PRB2288 Nylon Washers 4 PRB2564 Brass Tube for Water Inlet PRB2251 Rudder Bracket Arm PRB2651 Water Pump PRB3254 Decals PRB2683 Clutch PRB2684 C...

Page 11: ...10488 1 2007 Horizon Hobby Inc 4105 Fieldstone Road Champaign Illinois 61822 877 504 0233 www horizonhobby com www ProBoatModels com Printed in China www ProBoatModels com Building and Operating Notes ...

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