I am putting this information into the system so it can help someone in the future, relative to out of production hardware modifications.
There is a subpopulation of RV owners who like myself originally installed LASAR electronic ignition and are now migrating back to P-magentos. If you have the VM1000 engine monitor, and are using their supplied Tach sensor, the new P-mag produces an rpm reading that is 1/2 what it used to be with the LASAR system installed.
Remove the VM1000 DPU and take off the back cover held on with the four counter sunk screws. With the circuit board oriented right side up (writing legible) there are four columns of very small pins in the center. You will see two column sets on the right and two on the left. There is a blue "jumper" fitted across one pair of each of the column sets, based on the configuration of your engine. On the LH side columns, you will find "V1-" identified in one row, and "V1+" below it. I was told by the Vision Microsystem rep to carefully pull off the blue jumper from the V1+ pair and attach it to the V1- pair.
It worked!
Duane Bentley
RV6
N515DB
There is a subpopulation of RV owners who like myself originally installed LASAR electronic ignition and are now migrating back to P-magentos. If you have the VM1000 engine monitor, and are using their supplied Tach sensor, the new P-mag produces an rpm reading that is 1/2 what it used to be with the LASAR system installed.
Remove the VM1000 DPU and take off the back cover held on with the four counter sunk screws. With the circuit board oriented right side up (writing legible) there are four columns of very small pins in the center. You will see two column sets on the right and two on the left. There is a blue "jumper" fitted across one pair of each of the column sets, based on the configuration of your engine. On the LH side columns, you will find "V1-" identified in one row, and "V1+" below it. I was told by the Vision Microsystem rep to carefully pull off the blue jumper from the V1+ pair and attach it to the V1- pair.
It worked!
Duane Bentley
RV6
N515DB