J thomas has a 6.5 hp engine for lawnboy 21". i was wondering if anyone has used a different engine on their mower, other then the standard lawnboy motor. It costs $199, plus freight, and 2 small, cheap adaptor plates. My dealer was looking for $300 to fix a carb, and starter pull on my machine! http://www.j-thomas.com/Catalog/091.htm what do you think?