I need something like a guitar string, about 18 inches. Preferably
from a local store.
Maybe it can be a plastic wire.
It is for lengthening the throttle cable on a grass trimmer that I'm
using for a project. I tried straightening a wire, but it needs to be
perfectly straight so that it doesn't act like a spring. Under
stress, the engine sputters rhythmically. I'm sure it's the wire
acting like a spring.
Then I will need to find a sheath, but I will go for the wire first.
On Mon, 22 Apr 2013 17:08:38 +0000 (UTC), John Doe
Find a hobby shop that has straight lengths of music wire. It's used
by model-airplane folks. It's typically available in diameters ranging
from 0.006" or so up to 1/8". Over 1/8, it's technically not music
wire, but hobby shops may have thicker pieces.
It's plain-carbon steel; extremely strong (from 100,000 psi tensile to
well over 200,000 psi) and it rusts like hell, so you'll need to coat
I'm going to try 1/16" (or so) diameter nylon string. If that causes
the same sputtering that is probably due to some sort of throttle
system oscillation, or if it stretches too much, I will carefully
moisten it with superglue in order to stiffen it while it is under
tension, and try again.
If that doesn't work, a hobby shop is nearby.
Thanks to the replies, and any that might be in the queue.
On Monday, April 22, 2013 10:08:38 AM UTC-7, John Doe wrote:
Hobby shops and real hardware stores sell piano wire,
which is steel wire, usually in straight 36" lengths.
Bicycle, motorcycle, and hobby shops sell push-pull
cables for controlling stuff like throttles and brakes,
and they come sheathed. The cables inside are
flexible, but the sheath can keep them very stiff.
Not that matters, but...
Being a push-pull cable would be even more difficult to extend. In
this case, I think the carburetor tension is significantly more than
the hand throttle tension pulling in the other direction, so the
cable is always being pulled in only one direction, fortunately.
Doesn't sound like a cable problem unless the engine/carb can flex
relative to the throttle control.
If you want a good cable just hit a bike shop. That gives you easily
modified cable with protective sheath. As long as the ends of the sheath
are secured to the respective control areas the motions of the cable
will have no impact on engine stability.
What it sounds more like is that you are running the engine lean or
under a load that it cannot handle.
Even though I know little about gasoline engines, those are the
two thoughts I first had, but... Everything else is the same as
when it was running fine, before extending the throttle cable with
a slightly crooked wire. In my view, some sort of feedback caused
by a springy throttle wire (that causes sputtering) is the best
lead. It is easy to try and it should be obvious if it is.
I replaced the throttle extension cable with a 3/32" nylon string.
Or the ignition kill switch wire might have been shorting. I suppose
that could have been rhythmic. Trying to rev the engine might have
caused the shorting. I suppose that could have caused an
In any case, now the acceleration is normal and smooth, no
I'm aware of the need for a fuel stabilizer.
Thanks to the replies.
They look good and they are definitely good for adding upper body
exercise. I used a pair of trekking poles until they were destroyed,
now the aluminum is being used. Every once in awhile, a carbide tip
got caught in a sidewalk crack. If I didn't release the stick
instantly, the tip was damaged. Eventually the end was destroyed.
The push stick isn't for exercise, it's for fun and for getting from
here to there. Street skating is outrageous fun. Manual pushing is
not part of the fun. Basically, pushing sucks when you're not trying
to get exercise.
My big front wheel skates are better than Coyotes for rough
terrain. Big wheels are great, but you only need a big wheel in
front. The only thing that big trailing wheels do is raise your
center of balance, that's not good. Yesterday when I took my most
recent GoTail (inline skating push stick) out for a test run,
somebody stuck their head out the car window and started asking me
about the big front wheels on my skates. I get comments on them
more than anything else so far.
Agree with Steve. The problem is not the wire, it's the gas/air mixture and
there should be an adjustment for that where the gas and air come together
before they go into the engine. That used to be inside a device called a
carburetor; but maybe it's called something else on that type of engine.
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