ok guys, i have a k/b 7.5 and a turbax 1 fan. is it possible to mount a larger engine on this fan? fan is new. but dont have the mounting brakets. it is drilled and tapped for the k/b 7.5. the k/b is the front carb version with the perry carb and pump. this will be in my yellow a4 and want ot go with a bigger engine. what can i do? please tell me. i am trying to sell the setup to get something else but no responces. thanks guys. doug

Call and talk to Larry Wolfe at jethangar.com. The old front carb K&B 7.5 ran, but poorly and was superceded by rear-rotor rear carb DF engines. The Turbax can be upgraded with a new center body from JHH to accomodate a difficult to find K&B 9101 or .48, an OS DF engine, or larger Rossi 65. But I would take Larry's advice and recommendation for the best powerplant for the yellow A4. You don't want to skimp on power and lose that plane on the 1st flight