RCU Forums - anybody know the difference?

RCU Forums (https://www.rcuniverse.com/forum/)

- Profile and Fun Flying Planes (https://www.rcuniverse.com/forum/profile-fun-flying-planes-105/)

- - anybody know the difference? (https://www.rcuniverse.com/forum/profile-fun-flying-planes-105/10453058-anybody-know-difference.html)

anybody know the difference?

I'm looking for an inexpensive engine for an OMP Yak 65" profile. I'm looking at the ASP engines and found 1 place that caries them. I'm looking at the ASP .91 but I'm a little confused. I don't know what the difference is between these 3 engines. Anybody know what the difference is? Here's the links to the engines. The descriptions sure don't tell much.
http://www.hobbypartz.com/72p-s91aii.html
http://www.hobbypartz.com/72p-s91a.html
http://www.hobbypartz.com/fm01-10-s9...troengine.html

Thanks

RE: anybody know the difference?

Same engine.......one comes with a muffler....one without!!!:D

RE: anybody know the difference?

Eh, no.

One has the remote needle assembly the other does not.

The 91A has a slightly milder port configuration compared to the 91AII