Originally Posted by
TomCrump
I considered putting one in mine, but hesitated, and then deferred to a .91 Surpass.
I wanted to mount my engine inverted. I was afraid that the unpressurized .61 might encounter problems.
Do you have any thoughts about this ?
The OS FS 61 runs fine without pressure, evidently the carb venturi is small enough that it creates good draw. And I think they sound cool unmuffled. If you like a muffler, those from an FS 40,48 will fit. maybe up to a 70.
This Sr. twin had two FS 61's with straight pipes. One of the engines is now in the Sport.
http://www.rcuniverse.com/gallery/ga...mberId%3D22126