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Impulse 31

Maintenance 

CAuTION:

 Always replace the flexshaft when it is 

damaged or shows visible wear. Failure to do so could 

result in personal injury or property damage.

Lubricating the flexshaft is vital to the life of the 

drivetrain. The lubricant also acts as a water seal, keeping 

water from entering the hull through the stuffing box. 
Lubricate the flexshaft, propeller shaft and all moving 

parts after every 2–3 hours of operation. Always replace 

any parts that show visible wear or damage.
1.  Loosen the coupling between the motor and  

the flexshaft.

2.  Loosen the setscrew from the flexshaft and remove 

the flexshaft from the back of the boat.

Tip:

 Use paper or cloth to touch the flexshaft.   

3.  Remove the drive shaft by sliding it out of the stuffing 

box. Wipe lubricant and material from the flexshaft. 

Lubricate the full length of the flexshaft assembly  

up to the drive dog using marine grease (PRB0101  

or PRB0100). 

4.  Apply threadlock to the coupling setscrew.  

Threadlock will help prevent the flexshaft  

from loosening during use.

5.  Carefully reinstall the drive shaft, ensuring that there 

is a 1–2mm gap between the prop strut and the drive 

dog to allow for flexshaft shrinkage under load.

NOTICE:

 Running the boat in saltwater could  

cause some parts to corrode. If you run the boat  

in saltwater, rinse it thoroughly in fresh water  

after each use and lubricate the drive system.

NOTICE: 

Because of its corrosive effects,  

running RC boats in saltwater is at the discretion  

of the modeler.

10

Summary of Contents for Impulse 31 PRB4250B

Page 1: ...Owners Manual Bedienungsanleitung Manuel de l utilisateur Manuale dell utente PRB4250B...

Page 2: ...UTION Procedures which if not properly followed create the probability of physical property damage AND a possibility of serious injury WARNING Procedures which if not properly followed create the prob...

Page 3: ...Carefully remove the boat and radio transmitter from the box Inspect the boat for damage If you find damage is present please contact the hobby shop where you purchased your boat Contents Introductio...

Page 4: ...tem or the motor and ESC electronic speed control may overheat Ensure the trim tab panels are flush with the bottom of the boat You may desire to bend the trim tabs for wind and water conditions To ad...

Page 5: ...rew to hold the pack s Loosen the wing nut and move the pack s forward or back to adjust the center of gravity for your boat Move the pack s toward the bow so the bow rides lower in the water Move the...

Page 6: ...Switch on N See ST REV switch Steering Rate Adjusts the amount the rudder moves when the steering wheel is turned left or right POWER ST TRIM TH TRIM ST RATE Throttle Trigger Controls power to the mot...

Page 7: ...hrottle trigger to neutral The auto sensing voltage cutoff will also engage when the ESC detects low battery charge If this occurs release the throttle and recharge the boat batteries right left rever...

Page 8: ...it is moving quickly Always pilot your boat for the wind and water conditions so that the boat does not turn over When running your boat for the first time we recommend calm wind and water conditions...

Page 9: ...ghtly when adjusting the propeller strut Loosen the motor mounting screws when adjusting the propeller strut angle trim and retighten after adjustment is complete Use a 3mm hex wrench and 7mm nut driv...

Page 10: ...oat Tip Use paper or cloth to touch the flexshaft 3 Remove the drive shaft by sliding it out of the stuffing box Wipe lubricant and material from the flexshaft Lubricate the full length of the flexsha...

Page 11: ...trunner motors High timing increases both motor RPM and current draw up to 20 increase compared to low timing using the same battery pack and prop Run times will be signicantly reduced Only use High T...

Page 12: ...to other controls Throttle servo travel is lower than 100 Make sure throttle servo travel is 100 or greater Throttle channel is reversed Reverse throttle channel on transmitter Extra noise or extra vi...

Page 13: ...nds to turn one direction Rudder or rudder trim is not centered Repair rudder or adjust rudder and rudder trim for straight running when control is at neutral Vertical fins are angled incorrectly Angl...

Page 14: ...er are not prepared to accept the liability associated with the use of the Product purchaser is advised to return the Product immediately in new and unused condition to the place of purchase Law These...

Page 15: ...www horizonhobby com content _service center_ render service center NOTICE Horizon service is limited to Product compliant in the country of use and ownership If non compliant product is received by H...

Page 16: ...formation about where you can drop off your waste equipment for recycling please contact your local city office your household waste disposal service or where you purchased the product Compliance Info...

Page 17: ...Impulse 31 17 Identification of Components A K P M S E O G N D F B L...

Page 18: ...trut IM31 Q PRB4267 Flexshaft Liner IM31 R PRB4268 Battery Cover IM31 S PRB4269 Rudder Pivot Shaft IM31 T DYNM3820 80A Dual Battery Marine Brushless ESC U DYNM3830 1800Kv 6 pole Water Cooled Marine Mo...

Page 19: ...Impulse 31 19...

Page 20: ...Inc Pro Boat Impulse Dynamite Speedpack EC3 Prophet DSM DSM2 the Pro Boat logo and the Horizon Hobby logo are trademarks or registered trademarks of Horizon Hobby Inc The Spektrum trademark is used w...

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