PCU5000X Prop Governor question

[N49ex]

I have had a PCU5000X prop governor for a number of years on my I/O-390, Hartzel three blade scimitar aluminum prop. Prop pitch stop is perfect with 2650 RPM at full throttle (brakes on) and prop governs perfectly at 2700 rpm in stabilized full throttle climb. Holding the brakes till pitch stop 2650 RPM and then brakes off for take off, the prop properly unloads and the governor keeps up smoothly transitioning to 2700 in the takeoff roll and climb out. However, if I let the plane start takeoff roll immediately as I advance to full throttle, the prop over speeds past 2700 RPM to around 2750 for a while until the governor "catches up", restoring 2700 RPM. In flight prop RPM adjustments pretty much respond immediately. It seems on take off the governor is sluggish.

Since there are a lot of PCU5000X's out there in the RV community, I'm wondering what other's experience is? Is my governor perhaps ready for an overhaul? It has about 750 hours since new. Have I forgotten proper technique? Does every PCU5000X behave this way?

Thanks in advance for any advice!

 

[Skysailor]

The low pitch stop on your propeller needs adjustment. Do a search here for a thread on this including a link to a video on how to properly adjust it. The governor is performing correctly.

 

[flysrv10]

Here is a good clip by Vic on how to check your prop governor adjustment:

 

[lr172]

if I let the plane start takeoff roll immediately as I advance to full throttle, the prop over speeds past 2700 RPM to around 2750 for a while until the governor "catches up", restoring 2700 RPM. In flight prop RPM adjustments pretty much respond immediately. It seems on take off the governor is sluggish.

only flown a 5000 equipped plane a few times, but it is not uncommon for a gov to overspeed just a bit on initial to power application. The faster you pour on the coals the longer the lag.

Possible this has always been this way and you just didn't notice it? 2750 for a couple seconds is fine for these engines.

 

[clam]

I believe the following to be somewhat related to OP, so I'll post here...
I had about 550 hours of trouble free operation on PCU5000X with WW200RV propeller.

I sent propeller and governor out for overhaul. This was based on combination of the calendar interval/approaching the hours interval/long range planning/etc.

After overhaul, I now get rpm "surging" of about 10-30rpm when the rpm is set to 2600 or higher. The rpm indications are supported by audible and seat of the pants feedback.

There are no leaks, no apparent control interferences, nothing else I can find. RPM governing below 2600 is solid, as it has always been.

Overhaul shop originally said "it needs a new spring", so I sent it back. They returned it stating "we increased the pressure relief setting", but no indication of this spring replacement. They have become increasingly difficult to get a hold of... voicemail box full, emails unanswered, etc.

Does this spring replacement (to a stiffer spring?) seem to be the way to address this?
Any suggestions on what else may the cause or a better solution?