Try connecting your existing starter to your car battery and see if it will spin the engine. Sometimes the little batteries commonly used in field boxes cannotsupply enough juice.

This starter looks like it would start just about anything. Probably overkill for a 1.80 but also the last one you should need if you go to super big engines.
http://www3.towerhobbies.com/cgi-bin...?&I=LXLYW5&P=0