7 Apr 2009 Read through the entire manual before operating this product. • The GY520 the GY520 or the servo, possibly resulting in a loss of control. Size slightly larger than a GY520 or GY611, it incorporates the technology S-BUS and allows use Futaba servos in 760 ?s to the contrary GY611. The LCDFutaba GY520 Pdf User Manuals. View online or download Futaba GY520 Instruction Manual. 9 Nov 2011 The GY611 comes with a detailed instruction manual. revolutionized gyro performance in 2000 -- and the GY520 is doing it again today. The little manual with the BLS251 says "Do no use the BLS251 with. Compatible with Futaba GY601 and GY611, Spartan DS760, and any other gyro that supports I used it all last season on my GY520, same result. Thank you for purchasing a GY520 AVCS gyro. Before using your new gyro, please read this instruction manual thoroughly and use the gyro properly and safely. Before using your new gyro, please read this manual thoroughly and use the •No part of this manual may be reproduced in any form without prior permission. View and Download FUTABA GY611 instruction manual online. AVCS GYRO FOR MODEL HELICOPTER. GY611 Accessories pdf manual download.