Correct Torque for MK25 (Evo) Seat Retainer

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NowTeelus

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Hello everybody,

I have different informations regarding the correct torque of the MK25(Evo) seat retainer:

In the older Frogkick manual for the MK20/MK25, Scubapro recommends to tighten the screw to a torque of 15NM or 130 in lbs.
On the (round) seat retainer of my old MK20, there's also the imprint "TORQUE 15-17 NEWTON x m" (picture).

In a (also from Frogkick) schematic of the MK25 AF, rev D, the torque of the new hex seat retainer is declared as 30NM or 266 in lbs.

What do you think? I don't know if I'm correct, but to my eyes, the technical difference between the old round and the new hex seat retainer seems to be rather the outer form, but less it's function as a screw. I't just an impression, but I think that 30NM would be far to high.

So, what do you do?
seatretainer.jpg
 
Follow the manual and use a torque wrench if you are so inclined.

There are mechanical differences that could probably explain the difference in torque specs.
 
There was as far as I remember only one MK25 model, the MK25TI (TI-ALLOY), which demanded on their schematics 30Nm-266lb.inch torque.
All the others over the years used between 15-17Nm-150lb.inch, including the MK25EVO......
 
This above is the Mk25 Chrome, which is the most common one.
 
Hello everybody,

I have different informations regarding the correct torque of the MK25(Evo) seat retainer:

In the older Frogkick manual for the MK20/MK25, Scubapro recommends to tighten the screw to a torque of 15NM or 130 in lbs.
On the (round) seat retainer of my old MK20, there's also the imprint "TORQUE 15-17 NEWTON x m" (picture).

In a (also from Frogkick) schematic of the MK25 AF, rev D, the torque of the new hex seat retainer is declared as 30NM or 266 in lbs.

What do you think? I don't know if I'm correct, but to my eyes, the technical difference between the old round and the new hex seat retainer seems to be rather the outer form, but less it's function as a screw. I't just an impression, but I think that 30NM would be far to high.

So, what do you do?

View attachment 491736
 

Attachments

  • 10-713-0X0 MK25 EVO.pdf
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