Mk4is power problem.

[Phil Russell]

What size do I need

BS003 for .177
BS004 for .22
These are old references for Daystate probes but I believe they are still valid.
One source says use 90 shore but others use 70. Personally I have not noticed a difference and use BS003 in 70 shore for my .177.

Rings are available 'on line' very cheaply.
Cheers, Phil

[woodpigeon]

Thanks Phil much appreciated

[woodpigeon]

Update
Battery charged to 9.9v still 10.4 ft llb,changed probe o ring and no change in power🧐.
As a footnote the battery was replaced 18 months ago and a new pressure sensor fitted by Dave at scr and the power reset at 11.6.
I have just reset to default which takes you back to factory settings but no joy.

[Shed tuner]

I'd take the hammer out and ensure everything nice and clean

[woodpigeon]

I'd take the hammer out and ensure everything nice and clean

Way above my gunsmith skills that mate 🙈

[scoots]

Update
Battery charged to 9.9v still 10.4 ft llb,changed probe o ring and no change in power🧐.
As a footnote the battery was replaced 18 months ago and a new pressure sensor fitted by Dave at scr and the power reset at 11.6.
I have just reset to default which takes you back to factory settings but no joy.

9.9v is a good result mate...10.4 not too far off the mark....do some pellet testing...mine loves the jsb exacts
..

[Jesim1]

https://spares.bagnallandkirkwood.co...-o-ring-seals/

https://www./itm/5-x-Daystate-Pellet...-/281230018401

Just select non FAC for a standard gun in the right caliber