Can a 6 inch planer yield decent results on timbers larger than 6"?

I've planed timbers up to 10" with mine. Take your time and plane off a little at a time. You may get a ridge if you take off too much. If that happens, what I do is finish up with a hand plane.
Good luck
Mark

We are also looking for a beam planer this year
The wide planers are soooo expensive, but one pass would be a lot of time savings in the long run..how much does the 6 inch makita planer cost?
-Mark in Ontario
http://www.wpltree.ca/

I've done it many times. Just alternate sides, and watch out for crowning. The technique that works best for me is to take a full width pass on the left edge of the timber, then go back for a second pass on the right edge, but turn the planer at an angle. Keep as much of the back end of the planer bed on the left side as possible, and keep pressure on the back end. This helps keep the two sides in the same plane (no pun intended). That applies only to the Makita. I also have a protool 8", and the technique is different. CB.

Thanks all for the great advice!
Mark