Z
- Zanzottera Technologies - Italy
- Zenoah - Japan
- Zlin
- Zoche
- Zündapp
- Ackerman - (See Akkerman)Source: RMV
- Aero (See AVIA)
- AES - (See Rev-Air)
- AIC (Aviation Ind. China. See Catic and Carec)
Read more about this topic: List Of Aircraft Engine Manufacturers