Welcome to the forum trailblzr!
All 29er Marz forks suffer from a serious lack of rigidity. They are very out of favor by most on this forum. The marathon SL is the most difficult of the bunch to tune as it is finicky on the pos an neg air pressure settings.
Here is something I posted a while back on the same subject:
I have a '04 marz MX Pro with 105mm travel & air assisted coil spring. Came on my '04 Sugar 293. It is possibly the best 29er fork that Marz has made, very easy to adjust with good dampening action.. Problem is, that is not saying much: it's a noodle. My new fork tracks thru babyheads sections sooo much better. Way less drama holding a line in the rolly loose, lots more moto.
I was going to hold onto it in case my '06 Tora (econo-Reba on steroids) fails. No way that thing is going back on any bike that I own. I guess I'll just wait until we get closer to spring and dump it on ebay.
I'm having a fully rigid 29er built for touring this year. It will be built suspension corrected, but all touring will be done with a rigid fork.
If you use the search function you will find lots on this subject.
29erchico