ORIGINAL: jimmyjames213
if your car battery will not turn it something is wrong, maybe the cone idk
He is NOT using a "car battery" ( which incidentaly gaRCfield would put out about 13.8v or so since the car battery would see almost no load ).
He's stated that he is using one of these:
[link=http://www3.towerhobbies.com/cgi-bin/wti0001p?&I=LXL372&P=ML]Click me![/link]
While adecuate for a .40 glow engine those things are awful for anything larger... and even then the included 12v battery barely lasted me a season before it was used up.