Hi syog100,
I assume you got this cat?
http://r2hobbies.com/eng/proddetail....bt0402001_code
I run the R2hobbies Arowana, which has the same motor, I get about 6-7 minutes runtime with a 5000mAh 4S1P 25C Lipo.
I use a 100A watercooled Mystery ESC, which gets warm after a full six minute run.
As the max motor current is 47A, which it
will draw getting out of the hole, probably close to double that amount, I doubt if a 60A ESC, properly watercooled will cope...
As all RTR boats (there's no such thing as ready to run! At best the boat is assembled at the factory, often not very good either...) the cat needs to be checked for leaks, all bolts tightened and secured with Loctite, the drive train lubed and alligned.
Don't assume the Chinese did this for you, do it yourself!
If you want to run two packs, put them in the sponsons with Velcro and connect them in series, if you use two 2S packs, or in parallel if you use two 4S packs.
Getting the weight down from the tunnel is good for the CoG and improves the handling.
Regards, Jan.