Resetting the ECM on Massimo 500

[Old Outlaw]

Somewhere, sometime, I remember a video of a guy who reset the ECM on his Massimo 500 after changing out the injector, adding a fuel filter, and some other stuff.??? He did it by starting the machine and then going full throttle while in neutral for X# of seconds. Anyone know this process exactly or point me to the video?

[Kenh]

On the massimo msu500 , Start the motor, then press on the gas all the way and let the riv limiter cycle holding the gas pedal all the way down, turn off the ignition, then let up on the gas pedal. Then it should be reset.

 

Edited May 20, 2023 by Kenh
On the Massimo MSU500

[Greg Kilgore]

This may work. Works for my Axis which is made by hisun just like the Massimo.

Begin with the machine off.

Cycle the key on and off 5 times within 5 -10 seconds. Making sure the fuel pump kicks on each time.

After the 5th key off. Wait 30 seconds then start. Should be reset.