Took another closer look at a NEW Poulan 31cc, the one I have is nearly identical. The new one also has a rear carb. The muffler on the new one is secured with two screws though. The one I have must be an older model. I'm pretty sure though it is a Poulan. I'll have to check the numbers. Any ideas on how to mount a muffler? Are there stap ons for converted engines?