A friend of mine asked me to overhaul a 20+ yo Omer Skorpion he hardly ever used. The gun was dismantled, cleaned and inspected in all its components. Despite the large amount of oily sludge the overall conditions are still remarkably good and could be returned in as new conditions or even improved while rebuilding it. Here are the areas that need attention.
Piston:
The 13 mm piston is in good conditions but it has a large cup seal I have seen on other older guns and never liked. The soft seal skirt contact area is large and while it is pressurized it creates considerable friction which is evident when loading the gun. In the picture the one on the right is the Skorpion 13mm piston and the left is the 11mm Cyrano piston. I would like to change the whole piston and ideally get one with the seal like the Cyrano. That seal is thicker and stiffer and has a very thin edge that produces minimal friction and maintains better lubrication. It is a common seal I have seen used in high pressure hydraulic system in various dynamic sealing applications in components from proportional valves to hydraulic cylinders. Apart from the Cressi Saetta it seems that most other 13 mm pistons have the big soft seal and the 11mm ones have the smaller one. I have still have not figured out why. The Cyrano even on higher pressure offers smoother loading of the 13mm guns I have used and it not just because of the smaller piston area.
Charging valve:
The oil degradation has caused some corrosion of the valve 6mm ball. I could buy a new ball or change the whole valve. Is there one from other brands that fits?
Shock absorber:
The bushing is partially broken at the step where the piston lands. What brand absorber can fit?
Trigger release pin:
It has a 3mm pin. Is there any 1.5mm upgrade kit? The original trigger contact area with the pin is only plastic so the 1.5mmpin may work only if the trigger is changed to one like the Mares with a stainless adjusting screw. They look identical minus the adjusting screw.
http://www.articolipescasportiva.it...p?pageelenco=2¯o=141&categoria=92&id=1290
Seals:
Does anyone has the dimensions of the O-rings. One post mentions that the Tempest handle is the same and so are the O-rings. The tank is 40mm dia. Does it have the common issue with the “special” O-ring (CS2.25x31.2 ID) like Mares and others?
Piston:
The 13 mm piston is in good conditions but it has a large cup seal I have seen on other older guns and never liked. The soft seal skirt contact area is large and while it is pressurized it creates considerable friction which is evident when loading the gun. In the picture the one on the right is the Skorpion 13mm piston and the left is the 11mm Cyrano piston. I would like to change the whole piston and ideally get one with the seal like the Cyrano. That seal is thicker and stiffer and has a very thin edge that produces minimal friction and maintains better lubrication. It is a common seal I have seen used in high pressure hydraulic system in various dynamic sealing applications in components from proportional valves to hydraulic cylinders. Apart from the Cressi Saetta it seems that most other 13 mm pistons have the big soft seal and the 11mm ones have the smaller one. I have still have not figured out why. The Cyrano even on higher pressure offers smoother loading of the 13mm guns I have used and it not just because of the smaller piston area.
Charging valve:
The oil degradation has caused some corrosion of the valve 6mm ball. I could buy a new ball or change the whole valve. Is there one from other brands that fits?
Shock absorber:
The bushing is partially broken at the step where the piston lands. What brand absorber can fit?
Trigger release pin:
It has a 3mm pin. Is there any 1.5mm upgrade kit? The original trigger contact area with the pin is only plastic so the 1.5mmpin may work only if the trigger is changed to one like the Mares with a stainless adjusting screw. They look identical minus the adjusting screw.
http://www.articolipescasportiva.it...p?pageelenco=2¯o=141&categoria=92&id=1290
Seals:
Does anyone has the dimensions of the O-rings. One post mentions that the Tempest handle is the same and so are the O-rings. The tank is 40mm dia. Does it have the common issue with the “special” O-ring (CS2.25x31.2 ID) like Mares and others?