Don't know when you purchased your engine ...

I sent mine back last year so they counld determine why it wouldn't run well ... turned out to be the electronic module.

But while they had it, they changed the bearings and crankshaft ... said it was precautionary ... had some early problems.

I had noticed the crankshaft moved fore & aft after 3 gallons of fuel ... now it doesn't.

Check for this movement ... if it is sloppy ... call DA ... maybe a bearing problem ... they have great service.