SHG-Mtroniks Viper Marine Electronic Speed Controllers


The Viper Marine Controllers are a brushed speed control designed specifically for use in RC model boats.

the controllers have a marked 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 the marked amperage limit under load (with the prop connected, under water).

These controllers are the perfect speed controller for anybody wanting a no nonsense reversible electronic speed control for scale & Sport model RC boats at Regular Scale speeds.

The line of Viper marine speed controls, have a wide range of features 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 that the Viper Marine range of speed controllers are all completely 100% waterproof.

The range of Viper Controllers are designed to work on a voltage range from 6v to 13v and will work from NiMh Batteries, SLA batteries and other types, although these controllers do not have a low voltage cutoff for use on LiPo type batteries.

The controllers are designed to work on fully charged 12V Lead Acid batteries,which read well over 12v

Please note, controllers are a polarised piece of electronic equipment, and as such will be destroyed by connecting the power leads to the battery in reverse polarity, this damage is not covered by item warranty.

Typical Usage
Viper Micro 10a - Small models and motors up to 370 Size Continuous drain 7.5a Max drain 10a Fuse at 5 to 7.5a
Typically small scale models or converted small plastic models

Viper 15a - Small to intermediate models and motors from 385 up to 540/1 Low Drain Size, Continuous drain 10a - Max drain 15a Fuse at 10a . Typical use, scale models like Tugs and Workboats with lower power 385 to 540/1 motors not for use with high power motors.

Viper 20a - intermediate and larger models and motors with heavier current Drain, Continuous drain 15A - Max drain 20A. Fuse at 15a,  A heavier controller that can be used with models and motors needing more power, will work well with models such as Club 500 mini Club racer with a 550 motor, but will also work with larger 800 Motors in scale workboats and tugs.


Viper 25a - For larger models and motors with heavier current Drain, Continuous drain 20a - Max drain 25a. Fuse at 20A
This Controller will handle most motors for scale boats, works well with large Torpedo 850 motors in large patrol Boats and can be used with smaller higher drain motors for small fastish boats, always be aware of maximum current drain.

Wiring Packs
The listed wiring packs give you all the wire and connectors you need to connect your controller in the correct way, the pack contains Motor Wires in Blue & Yellow to match the Speed Controller, 4mm Bullet Connectors & Heatshrink for proper push in connection to the Speed Controller leads and a Fuse Holder to fit in the main power lead to the battery along with a pack of 5 appropriate fuses for your controller

SLA Battery Lead
For those of you who wish to use Sealed Lead Acid Batteries we supply a Tamiya lead with the correct connecter for the Speed Controller and Heat Shrink sleeve for covering the joint on the battery.
Please Solder these connector leads to the battery and don't use push on Spade Terminals, they are a recipe for disaster as they can be pushed on the the wrong terminal if you are not concentrating.



The S.H.G range of components are produced in the U.K. or imported from leading manufacturers around the world for sale in the U.K. and worldwide

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