206 I'm flying at work has a MT prop on it . Been getting a random surging on takeoff roll in MP, RPM and fuel flow . I'm not hamfisting the throttle while adding power. Seems to surge right around the 25 inches mp area weather I add power ridiculously slow or smash it in like I'm running from the law . Any ideas ?

I don't run a MT on a 206 but I do on a 185 and presume that it is a similar situation. There is absolutely no surging as I advance the throttle to full power. Could the governor be attempting to adjust the blade angles before you get to full power suggesting a problem with your low pitch stop.

Or with what sounds worse with changes in MP, fuel pressure, and RPM, could you have a problem with your throttle arm/butterfly assembly? Someone posted here recently about a wear problem with their throttle body and butterfly valve connection that would have led to serious inflight problems had it not been identified and fixed.

My experience with surging MTs on a couple different airplanes has always turned out to be caused by something other than the prop. Usually mags, timing, or plugs. But once a fuel flow problem. The MT just doesn't have the flywheel effect to mask these problems... A good thing in my way of thinking...

Take care, Rob

Wow , Thanks guys . In the time it took me to dial in my morning cuppa Joe I got two responses . Pretty awesome !! I am concerned that it may be connected to a fuel flow issue as the fuel flow needle once up and running has been dancing a little bit .So far the prop gov has been taken off and overhauled , ( and it turned out it wasn't the right one that was installed )the turbo has been sent away to the spa ect . They dipped it in holy water and it's all dialed in ... Motor has about 75 hrs smoh and it's giving me the creeps .