The future of speed control is here

Mtroniks Viper Marine75

  • £125.99
  • Easy one touch set up
  • Programmable
  • 12V  Operation
  • 75A Brushed motor limit

RC boat speed controller. Full description

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  • Description
  • Delivery and Returns

The Viper Marine75 is a new brushed speed controller designed specifically for use in RC boats with a battery voltage of between 12V and 15V. The installation, set up and operation of the new Viper marine75 has been designed to be exactly the same as the original Viper range which we have been 'warned' never to change!!

An exciting feature of the new Viper marine75 is addition of Lipo battery pack compatibility as well as the usual NiCAD/NiMH/Lead Acid and Gel cells that are more commonly used.

It has a 75Amp motor limit, what this means is that you can use any, DC brushed motor, as long as the current drawn by that motor does not exceed 75Amps under load (with the prop connected, under water).

The Viper marine75 controller also feature the new 4 quadrant control system that stops the motor completely before turning it in the opposite direction. This allows for perfectly symmetrical operation about the neutral position in both directions, allowing the modeller to achieve perfect slow control in all situations.

Other features of the Viper marine75 controller are the ability to turn reverse on or off. This is done easily by a single press of the set button, allowing you to use the controller in forwards and reverse or forwards only mode and a more powerful BEC, at 2.0Amps the BEC will allow the running of more extras direct from the receiver.

The new marine75 controller is sure to become a popular choice from the line of Mtroniks marine speed controllers and is one that we have spent a lot of time thinking about. The original marine75 controller was a big hit with modellers and when it was withdrawn from our range it did not go down well. The decision to re-work the marine75 was easy, completing the task took longer than we expected but the results are extremely good! The new marine75 is a very powerful, solid, reliable unit that is a worthy replacement for the older version that was liked so much!

All the origianl features are still included, such as a built in failsafe, 100% proportional, fine throttle control in both directions, and motor stall protection, which is a feature that cannot be overlooked when a possible encounter with weeds is always just round the corner. Not to forget it is 100% waterproof and designed to work on either, a fully charged 12V Lead Acid battery, 3S to 4S Lipo packs or between 8 and 12 NiMH cells.

For matching motor wires see 


Technical Specification

Product Type Speed Controller Only
Motor Type Brushed
Current Limit 75 Amps
Direction Programmable
Battery Type NiCAD/NiMH/Lead Acid/LiPo
Lipo safe Yes
Operating Voltage Maximum 14.8 Volts
Set up Push button
BEC 2.0A
Motor Short circuit protection Yes
Thermal overload protection Yes
Failsafe Built in
Dimensions L60.0mm x W37.0mm x H13.0mm
Weight 75.0g
Delivery & Returns


If the item is in stock we aim to despatch all orders within two working days (Monday to Friday). If any item is not in stock, please allow up to 14 days for delivery. For special order items, please allow 21 days delivery.

All goods sent within the UK are sent by Royal Mail or UPS and we aim for delivery within 3 working days. Overseas delivery may take a little longer and may be subject to delay in customs. Deliveries may be subject to import duties and taxes and the burden lies with the purchases to satisfy charges subsequently incurred.

Returns & Exchange Policy

At Mtroniks we want you to be totally happy with everything you purchase from us. If you have a problem it is very helpful to us if you Indicate what the problem is and whether you require us to take a look at it for you. We cannot refund to you if you do not have your purchase details!

If any of your items are faulty please let us know immediately on 01943 461482 or by emailing to and return them straight to us at the address below and we will exchange it for you as quickly as possible.

Please send your returns to:
Mtroniks Ltd.
41A Ilkley Road
West Yorkshire
LS21 3LP


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