EG100 Edger Not Cutting Smooth

[Rhodemont]

I recently purchased a Woodmizer EG100 14hp gas Edger.  Took a while to get it assembled and running and then tweaking to get tables and fence level and straight.  Have ben edging a lot of Ash 5/4 boards to 6,8,10,12.  I sawed the boards oversize to allow for shrink during air drying before edging to finish width.  They feed in and start sawing smooth but after the first couple feet they start to jerk about a bit making the edges not quite as smooth as I would like.  I have checked level of feed tables, alignment of feed/withdrawal belt, blade set up, etc. with no improvement.  It seems that the feed rate is too fast for the blade power.  The Website says the electric motor units have a variable speed.  Being the gas unit my only control is the fuel  lever so I can not adjust belt speed without turning down power to blades a well.  Thoughts?  

[caveman]

I'm not familiar with that edger, but if it is chain driven, you may be able to swap the sprockets to achieve a slower feed speed.