maintenance on the Mac 90?

[joeheli]

I have heard that the Mac engine has get maintenance at 50 hr. of use . Can someone tell how to do the maintenance on the Mac? what I have to do ?What to get ?etc.etc. ???

Thank you!!!

[Sonnyj]

Ola Jose I have a couple books,one is a 1967Benson GYRO COPTER engine installation,construction&Flight manual,it has some info and I have R&D parts & service would you like for me to email this info? ;D

[joeheli]

Yes, Please
I will apreciated ;D ;D ;D