Exactly why I only use an 8c Starter Box battery from Common Sense.
6000mah 4s Lipo at a max of 8c. Just as big as my gel cell almost. Use it in my OFNA Blue Top and I have never had a single issue on any engine ever.. Period. It still has plenty of power to grind the wheel do a fine powder on my chassis if I miss or my post move from coming loose.
I think anything over 10c is over kill when your using the OFNA Blue top they have way more then enough power to turn over any engine.