So I know I shouldn't have done this, but I rotated the flopper on my loaded evo 70. The gun fired, and broke the line release. The trigger was adjusted to be as unsensetive as possible, but would just allow the gun to fire. Is there a diagram or disassembly instructions available for the evo and evo hf?
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mares evo misfire, broken line release
- Thread starterz06pilot
- Start date
Thread Status: Hello
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So I made the situation worse. I was going to try to get the line release out and tapped out the trigger pin, and all of the air vented out. I found the trigger, but there must be a transmission pin between the trigger and gun that is now missing... Were can I purchase a complete evo handle with trigger group and line release?
The spare parts handle assembly will have to come from Mares directly, or their local distributor in your area. I suppose that the transmission pin is lost when the air blew it out of the gun once you removed the trigger pivot pin, but if indoors at the time you may be able to find it again. Check the cost as buying a handle assembly could be expensive compared with just replacing the gun.
In fact after thinking about it some more why not just replace the missing pin and broken parts? I don't see why you need the entire rear handle assembly.
In fact after thinking about it some more why not just replace the missing pin and broken parts? I don't see why you need the entire rear handle assembly.
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I guess I dont really need the whole assembly. In looking for parts online, I haven't been able to find individual parts like line releases, or transmission pins. I was able to find complete handles for the older cyrano guns (Unfortunately not the evo), and thought that was the only option for replacement parts. I will try and contact mares tomorrow and see if I can get parts (hopefully from someplace in my country).
Few day ago a friend of mine reported the same problem of dangerously sensitive trigger! He returned the gun to Mares.
Rotating the spear in a cocked pneumatic speargun muzzle in order to vertically align the shaft flopper is a dangerous thing to do unless you do it while taking the load off the sear tooth, which means pressing down hard on the speartip with the hand loader and then twisting the shaft while still maintaining that downwards pressure. This is because the "see-saw" action sear levers used in most rear handle pneumatic spearguns simply function as hooks, they are not locked in the latching position by any other lever. These sear levers release by being tipped upwards at their rear ends when you pull the trigger which lowers the sear tooth at the front end and then the piston tail pulls free. Rotating the piston while it is highly loaded in a cocked gun can cause the sear tooth to unhook as the engaged surfaces lose and then regain contact as they slide over each other, probably due to vibration of the sear lever.
I wrote the following post for another forum, but it also applies here.
If it was a fundamental design problem then all of the "Cyrano Evo" guns should be breaking their line releases, but given the number of failures being reported the problem must be down to a trigger adjustment made at the factory which is incorrect or slightly out on some of these guns. The current design does not provide much of a margin to play around with, but here is a way to check the gun out before you start using it.
Muzzle load the gun on land and immediately place the spear tip into a shallow drilled hole in a thick wooden block placed on the ground with the gun body pointed vertically downwards. The idea is you are going to pull the trigger with your body weight firmly braced against the gun while using both hands to hold it so that you don't allow the gun to rapidly push up off the now trapped spear shaft. As an additional precaution set the gun on "low power" and then maybe let some air out of the tank so that you can safely control the gun's release action. Any air released will not be coming from the main tank, but don't let too much air out. Place a loop ended line onto the line release finger with a weight such as a fishing sinker on the bottom end so that the line hangs down alongside the tank with just a few inches left for the weight to fall to the ground. An alternative method is to use an office supplies rubber band to tension a simple line loop running back from the front line wrap hook to the line release lever. Then brace yourself against the gun and squeeze the trigger slowly (always keep the gun on the low power setting during this test), the line release finger should drop the tensioned line slightly before you feel the piston catch (sear lever) release, or at the minimum both should occur simultaneously, but not later as the piston will reach the muzzle driving the spear tail stop diameter against the line slide thus loading up the line on the line release finger before it can move when you are actually spearfishing with the gun. Wet the gun down before conducting the test to provide some lubrication. Wetted line can slide around an immobilized line release finger, but once any slack in the line wraps is all used up the line release lever will probably break. Guns with a bungee at the shooting line anchor end can provide some give in the line wraps as the bungee stretches, but you would not want to rely on it protecting the line release lever from damage as the line under tension then has to drag around the hooks holding each end of a wrap.
On some guns you can push against the line release lever with your finger and feel for the moment of disengagement with the trigger rather than use a tensioned line to rotate the line release lever, but here you will need both hands on the gun, especially if it is a long one.