M20 J/ K Tacho generator or sensor

[Aerodon]

I'm trying to help Tal out with a replacement Tacho for his M20J.  It appears that the gauge is the same part number 880039-517 (2" electric), but my plane (M20K) has a sensor on the magneto and his has a tacho-generator where the cable drive is found on the engine.

The Tacho part number matches my parts manual for my serial number.  But I cannot find a part number for the sensor?

Anyone know these B&D Tacho's well enough to know whether they are compatible with tacho generators and magneto sensors?

Anyone know where to find the sensors in the parts manual or elsewhere?

Aerodon

 

 

 

 

 

[PT20J]

I removed a 2" 880039-515 B&D tach with a 880053-501 tach generator from my 1994 28V M20J. Both are for sale at Skyman Avionics 541-604-9573. You could check with Frank Crawford at Mooney to see if he has any compatibility info. Worst case you could replace the tach and generator both with the ones from my airplane which worked fine when removed.

[DC_Brasil]

I have recently removed an R-1-4-G30R270 Electronics International Tachometer from my 28V M20J. 

[Wingover]

23 hours ago, PT20J said:

I removed a 2" 880039-515 B&D tach with a 880053-501 tach generator from my 1994 28V M20J. Both are for sale at Skyman Avionics 541-604-9573. You could check with Frank Crawford at Mooney to see if he has any compatibility info. Worst case you could replace the tach and generator both with the ones from my airplane which worked fine when removed.

Skyman says they don't have the tach generator....

[PT20J]

32 minutes ago, Wingover said:

Skyman says they don't have the tach generator....

Call him back. I just talked to Skylar and he found it -- apparently it was misplaced in his inventory.

[geoffb]

On 1/23/2025 at 5:43 PM, DC_Brasil said:

I have recently removed an R-1-4-G30R270 Electronics International Tachometer from my 28V M20J. 

Same here.  Ditch the old and go with the EI, you won't be disappointed.

[Wingover]

I ended up buying @PT20J 's tach and generator (I guess he has enough money now to buy an Acclaim Ultra) .  I wanted to thank @Aerodon for the time he took to try and find out the correct part number.