PAGE 1 OF 4
REV. H, 04/10/08
WARNING:
THIS DEVICE IS DESIGNED AS A NOVELTY DEVICE. IT WILL GIVE HOURS OF FUN AND ENJOYMENT. HOWEVER, IT CAN CAUSE HARM TO YOU OR SOMEONE ELSE IF NOT USED PROPERLY. THIS SPUDGUN SHOULD ONLY BE USED UNDER ADULT SUPERVISION AT ALL TIMES.
DO NOT USE SPUDGUN IF STORED IN AREAS WHERE TEMPERATURES ARE BELOW FREEZING. COLD TEMPERATURES MAY CAUSE CRACKING OF PVC MATERIAL. IF YOU WISH TO USE SPUDGUN DURING WINTER MONTHS MAKE SURE GUN IS STORED IN WARM ROOM BEFORE USING. DO NOT USE IF SPUDGUN MATERIAL IS BELOW FREEZING.
NOTE:
All parts of this gun are warranted to work when you receive it. Please check the parts and the ignitor before you use the gun. If you find any parts that are defective contact me by e-mail (larryb @ itis.com) or fax (608-846-8659). Parts and performance are not guarantied after the gun is used.
Parts list:
1- 1.5, 2 ,2.5 or 3 inch x 36 inch barrel.
1- 4 inch clean out drain cap.
1- 4 inch combustion chamber, with handle and spark ignitor installed.
1- Mini tennis ball shooter complete assembly
Assembly instructions:
I have designed the gun to have a screw in barrel and require no use of cement. To assemble the barrel, screw it into the combustion chamber until it is seated fully. The Spud Gun is now ready to use. Please read the following warning and instructions before use of gun.
PAGE 2 OF 4
Make sure you are outside when shooting and loading.
Loading instructions:
1. Unscrew the clean out drain cap from the combustion chamber.
2. Take a potato that is larger that the barrel. Push the potato onto the beveled end of the barrel and it will cut the potato to the inside size of the barrel. For the tennis ball barrel, wetting the ball will help it slide easier. Take a ram rod and push the potato down to the end of the barrel (a yard stick will do fine).
3. Take your fuel and point the nozzle towards the inside of the combustion chamber. Spray about 1 to 2 seconds of fuel into the chamber. Quickly screw that drain cap back into the chamber. Be careful not to cross thread the cap.
4. Once the cap is screwed into the combustion chamber, point the gun away from anyone or any persons near you. Hold the handle and grip the barrel with the other hand. Press the ignitor with your thumb and the fuel will ignite sending the potato in the direction in which you pointed it.
5. After you have shot the gun, remove the cap and let the chamber ventilate before
trying another load.
6. After several shots you may wish to stand the gun upright on the chamber to let the
hair spray and moisture run out.
7. If you leave the cap screwed into the combustion chamber when not in use it may
become stuck in the chamber. If this happens refer to the cleaning section.
8. If you have the Mini tennis ball shooter and are using the Binca breath spray follow
the below instructions for different distances:
3 sprays = 30 yds
7 sprays = 70 yds
What to do when it doesn’t fire:
DON’T LOOK DOWN THE BARREL!
Miss fires are rare (but can happen). It is important have a good seal between the potato and barrel if the potato does not fully plug the barrel it can cause a miss fire or a very short shot. Use about 1 to 2 seconds of spray. You want a fine mist which will atomize the air and hair spray to get a good ignition. On windy days, the wind can blow the hair spray out of the chamber before you get the cap on. Try shielding the chamber from the wind when loading.
PAGE 3 OF 4
If you get no ignition after spraying fuel into the chamber and pressing the ignitor, remove the cap and let the chamber ventilate. If you apply too much fuel, you can cause the ignitor tip to short out (like a fouled spark plug). If you need to push the button 4 to 5 times before it fires, your wetting the tip. Try spraying away from the ignitor tip. Also applying too much fuel will displace the oxygen and cause miss fires. Let the chamber ventilate and dry out. You can check for a spark by looking at the ignitor spark gap and pressing the red button down and confirming the spark is jumping the gap. Make sure the chamber is ventilated and free of fuel before looking down the chamber and pressing the ignitor. If you get a blue flame inside the chamber quickly blow it out or place the cap in the chamber to snuff out the flame. The flame, if left to burn can melt the PVC pipe and cause the chamber to dis-form.
Cleaning your gun:
To clean your gun, (it can get sticky), I recommend using hot water and letting it run through the combustion chamber. You may remove the ignitor from the chamber, by unscrewing the jam nut that holds the ignitor in place. By tilting the gun at an angle and making sure the ignitor is up, you can do a good job of cleaning. If you get the ignitor wet, just let it dry before using again. There are no electrical parts inside the ingitor.
If the cap is hard to screw on, clean the threads of the cap and chamber with hot water and a small brush. It is recommended to clean often, hair spray when left to build up can be very difficult to remove. The cap threads will easily build up hair spray and become difficult to thread the cap on completely.
Other types of fuel:
I only recommend hair spray, but other spud gun site will give you examples of other types of fuel. The ingredient in the hair spray is butane and other ignitable gases.
I have used OFF insect repellent, Old Spice body spray (this works great) when I have no hair spray. I do NOT recommend other high ignitable gases such as gasoline, acetylene, propane, pure oxygen, NOS, ETC. This device was made to have fun, not hurt someone. Be careful what you shoot at. I have put a potato through ¼ inch fiber board at 50 feet by just using hair spray.
Replacing your ignitor:
The ignitor has 2 moving parts inside it, a spring and a metal rod. After many uses it may be necessary to replace the ignitor. If the ignitor will not spark or feels mushy, then it can be replaced. This ignitor can be purchased from places that sell gas grill accessories. Look for the type that has a threaded base, NOT the push-in type. If you cannot find one, you may purchase a new ignitor from us, check the order form for prices. Send me E-mail.
PAGE 4 OF 4
The cap is stuck in the chamber:
Due to the nature of hair spray, things can get sticky. If you leave you cap in the chamber and it becomes glued and cannot get it out, try the following.
Soak the threaded end of the combustion chamber in hot water. Hair spray is water soluble and will dissolve. By letting the chamber sit a pan of hot water (not boiling), it will loosen the hair spray and allow you to remove the cap and clean it before using again.
New products:
Keep watching my web page for new products and accessories for the spud gun.
Like the double barrel spud shot, TP launcher, rifled barrels, Tennis ball barrel, ‘T’ shirt barrel and the LASER sights..
Have fun and be safe, Tell your friends…
Let me know how you like it…. Larryb @ ITIS.com
Send me a picture with you and your gun, I’ll put it on my site.
Copyright (c), 1997 www.spudgun.com