Arthritic hands. Is there a way to keep the trigger on without holding it in all the time?

I expect the design of your new chainsaw will be similar to many small engined tools where owners often discover they need an extra hand.

Usually the throttle is opened (trigger pulled) and then the trigger lock is pressed and the trigger released. The lock will hold the throttle partway open; freeing both hands to hold the tool steady and pull the starter. The partway open throttle makes starting easier and once started, the engine will run fast aiding a quick warmup and less chance of dying or fading.
Once the engine has warmed enough so the choke can be disengaged, a quick squeeze of the trigger will allow the trigger lock to disengage...

Terry: According to eHow.com:

"

Put on a pair of safety glasses. Remove the fuel cap from the Weed Eater and set it aside. Fill the fuel tank with unleaded gasoline that has been mixed with quality 2-stroke oil in a 40:1 ratio. Replace the fuel cap.

Move the Weed Eater to a safe place and lay it flat on the ground. Depress the fuel bulb located beneath the carburetor approximately six times to prime the engine. Press it slowly so that fuel has adequate time to traverse the fuel line.

Slide the handlebar-mounted engine "On/Stop" switch to the "On" position. Slide the choke lever beneath the fuel tank to the "Full" position.

Depress the "Throttle Lock" lever located beside the engine "On/Stop" switch. Keeping the lever depressed, squeeze the throttle trigger. Release the throttle lock. This sequence holds the trigger in the depressed position, which aids in starting the Weed Eater.

Roll the Weed Eater so that it is resting on the engine and the trimmer head shield only. This will allow the spinning trimmer head to avoid contact with the ground. Brace the Weed Eater by holding it to the ground with one hand. Using your other hand, pull the starter rope quickly until the engine begins to run. Do not pull the rope more than a dozen times. If it fails to start by then, squeeze the throttle trigger and continue to pull until the engine starts.

Allow the Weed Eater to warm up for about 15 seconds, then slide the choke lever to the "Off" position. Let the trimmer run for another minute without touching the throttle lever. After the Weed Eater has warmed up, squeeze the throttle trigger once to disengage the throttle lock. The trimmer is now operational.

Read more : http://www.ehow.com/how_6720315_start-gas-weed-eater.html"

Most older and economy drills have only one direction. Time to upgrade.

Sounds to me like you have a bad cord. Clamp the saw to a workbench so that it can start and run safely without you having to hold it. Put tape or a wire tie around the trigger to hold it in. THEN plug it in. Then move the cord around, especially near where it enters the saw. If the saw starts and stops intermittently you have confirmed the bad cord. Good luck.

Sometimes that's caused by a slight vacuum created by the cooling process(you must have very good seals). Could you attach a handle or use a pry tool?

Trigger valve is part number A08368 or (old part #897458). Easy repair. Remove air supply hose, and nails. Remove pin holding trigger to expose trigger valve. Spray soapy water on valve to determin if air is leaking from outer part of valve (orings that contact the body) or around the pin. Remove roll pin/s holding trigger valve in body of gun (use 3mm pin driver, some guns have one pin others 2). With pins removed, apply air pressure to gun and valve will pop out (use heavy glove or rag in hand to catch valve because some valves come out with force). With trigger valve in hand notice the two groves on sides of valve that roll pins contact (when you re-insert valve align valve so groves align with roll pin in body). Remove the two pins holding inner workings of trigger valve. There are two orings on the trigger pin, three orings on the inner valve and two orings on the outer part of body of valve. Usually, the orings that cause leak are the two smallest on trigger pin and three on the inner valve (unless soapy water test indicates outer orings). Orings are available at dewalt service center by part number or if you like to tinker, Lowes has many usefull orings in the plumbing department or replace the whole valve for about $25. Use plenty of silicone paste lube on the orings (sold at lowes). Valve should press in without a great deal of force and be sure to align valve to roll pin in the body. Use 3mm punch to temp. hold valve in gun for test. Good luck

It sounds like the air pressure on your compressor is too high..lower it and see if your gun shoots better.

You may be able to fix this quickly if it isn't too dirty. Try spraying WD40 onto the chain, sprocket gears and bearings as you pedal backwards with one hand on the sprayer and the other hand turning the pedals backwards. You may also be able to hold a wire brush with one hand and turn the pedals backwards with the other, and clean things by holding the wire brush slightly against them. If this works, when done, spray a heavier oil onto the parts.

hi this should be reletively easy hold the end black bit with the sivler bit holde coming out not the black bit next to the yellow case on drill you hold the black part thats at end of drill by where the bit goes into not the black bit near the trigger hope i explain this ok.
Hold this bit tight then put drill in reverse then press trigger a couple of times it might be tight but shouldnt be that tight it wont undo.
1 put in reverse
2 hold black plastic piece near where drill bit goes into
3 press trigger few times
4 this should undo it allowing you to put a bit in
make sure its in reverse else you will just tighten it up more let me know if you need further assistance ok