Up for auction is a high-performance YS61-S LONG 

two-stroke long-stroke engine. Designed for pattern 

model aircraft, YS engines are world-renowned 

for their unique pressurized fuel injection system 

and legendary power. This specific "LONG S" model 

is a favorite among classic pattern enthusiasts 

for its torque and reliability.

The essential factory-sealed accessories 

(Check Valve, Needle Valve, and Hex Wrench) 

and the original manual (Japanese) are included 

as shown in the photos. 

While I believe the package is complete based on 

the original specifications, please check the pictures 

carefully to confirm everything you need is present.