Tippmanns are known for their reliability and are very simple markers making them very easy to repair. you need oil from a local paintball shop or regular sewing machine oil will do.
On one side of the marker there is a little "handle" for cocking the gun, pull that handle as far back as you can and you will see 1 o-ring. put 2 drops of oil on it and fire it a couple times without paintballs to test it. This solves the problem 9/10 for tippmanns, if not..
Sometimes paintballs can break inside your gun. Look and feel inside your breech (where the paintballs go into the gun) and check for paint. If its dirty this can be causing your problem, strip it down and clean it (refer to your manual if you have difficulty)
on one side of the marker there is a little "handle" for cocking the gun, pull that handle as far back as you can and you will see 1 o-ring. put 2 drops of oil on it and fire it a couple times without paintballs to test it. This solves the problem 9/10 for tippmanns
I can take that a couple of ways. Do you mean you want to fire more balls per second or you want the paintballs themselves to fly faster?
If you want to fire faster, make sure it's clean and properly lubed with a quality oil that made for paintball. Practice makes perfect and fire that ****** as often as you can, even without paint (that's cheaper!) so you can get your trigger finger in shape.
There are custom mods to the trigger, or you can buy a trigger that's smoother or a shorter pull. There are electronic trigger assemblies that make firing faster even easier.
If you're talking about making the balls fly out of the gun faster, that would be the "velocity adjustment". Your user guide shows you how to make that adjustment and which direction is up, and which is down.
A good suggestion is to check out a local field or paintball store, or an airsmith and they can give you some definite ideas you will want to pursue.
The sear is not catching the bolt and resetting it properly. Or, there is not enough air pressure to push the bolt back to its original position. I would take it to a gunsmith. Parts fly out of a Tippmann if you open it up.
First make sure your marker has been fully cleaned out (No paint in the marker).
Always follow the flow of air when a problem like this arises.
Make sure their is nothing blocking the ASA (Where your tank screws into the gun)
If you have a regulator make sure you are not running any lower than 800 PSI, if you have a gas through grip then disregard this step.
First check your hammer o-ring, if it is broken you need to replace it and oil it, if not just oil it. This is the most common reason you would have this problem.
If you did not solve your problem yet than check your sear which holds back the hammer. If it is rounded then the bolt will skip instead of re-cocking the gun. Make sure it is still sharp, if this is your problem you can buy a new sear or file the one you have.
There is a velocity adjuster on the left side of the body, just below and to the right of the "N" in "TIPPMANN."
In order to adjust the velocity you need to be in a place where it is safe and legal to fire your marker (paintball field, with all bystanders protected by netting or paintball goggles.) You will need a chronograph and a 3/16-inch hex wrench.
The adjuster is a screw that blocks the gas flow from the valve to the bolt. If you screw it in (clockwise) it blocks more of the gas, so your velocity goes down. If you screw it out (anti-clockwise) it blocks less gas, so the velocity goes up.
Just take a shot over the chronograph to check your velocity, adjust and check again until you get it where you want it. Most paintball fields limit velocity to 285 feet per second. Never go above 300 feet per second, as velocities above that are unsafe (beyond paintball goggle ratings and can cause damage and infection on skin due to the heavy impact.)
It is important to test and adjust the velocity before each day of play, and even multiple times during the day as weather changes, because it is affected by temperature.
or any combination of the above. Make sure you have a full tank, clean the marker and use paintball-specific oil to lube the internals. The 98 is a very dependable marker and I'm sure once you have the basics down you'll find it very reliable.
it could be a combination of a number of things.. most likely it has to do with the type of paint you're shooting; in regards to shell.. tippman guns are harder on paint therefore require a harder shell paint, also not all paintballs are exactly .68 caliber, meaning some a bigger and some are smaller.. could be that they're slightly to big for the bore of you barrell
Buy a oil for a few dollars made specifically for paintball. Put a few drops in the ASA(where the tank screws in) screw the tank in and try to fire it about 10 times. If the gun still goes FA or sputters, I highly recommend having it serviced by a local pro shop or Tippmann.
Accuracy is not adjustable with the screw on the side of the gun, that screw would be the velocity screw and should not be played with unless chronographing the gun to avoid setting it at unsafe velocities.
If you'd like better accuracy there are 2 upgrades you can make. #1 is higher grade paint. The more round and smooth the balls are, the more consistent and tighter the grouping will be. #2 is barrel. The closer the bore matches the paint, the more consistent and tighter the grouping will be also.
The part that is bad Tippmann calls a "ball latch". It's a small orange rubber part that keeps the ball in place before the marker is fired. The parts is inexpensive it is common in most paintball stores or can be found online at www.tippmannparts.com
I highly recommend taking this paintball marker to a local pro shop to have the part replaced. You can service this marker at home but is not easy to put together if you have experience working on then, they have a few springs under tention that make it tough to put back together. If you are interested in doing the repair yourself I highly recommend doing it on on a clean floor in a clean room so when you disassemble it it will be easier to find the springs that could shoot out.
One thing that will make it easier is to leave the feedneck on. It will keep one less spring from jumping out at you, just a tip from a pro. I also highly recommend not using a spray lubricant and to only use oils in you tippmann made for paintball guns.
I would look in to the bolt and check that it moves freely, also check that is properly lubed, and finally that your upgrade bolt does not need a different spring. I would also check the batteries on the grip if it is an E-trigger.
The reason for this malfunction can be caused for two things, one is that the trigger is not sitting right or one of the springs is not in place another reason that may cause the problem is over lubing the hammer, but must likely is the trigger not holding the hammer in the rear position until you pull the trigger. Hope this helps.
First you will need to know exactly the point where is liking from. I suggest you the powertube out and connected directly to the line so you can see what part is failing. After that there is no o-rings or anything involved so you would have to replace the part. It could be the line the powertube, or the valve. Here is a link to the manual in case you may not have it and a place where you can find parts for you 98 Custom.