OK, so to recap, here's the story. This Sears blower is about
8 years old. It always had one issue, which was that it ran better
on half choke, faster, than it would with the choke off. More
recently, it got more fussy, and finally would not start at all.
Investigating, it was not pumping gas, pushing the priming bulb
would not make gas flow, the bulb fill, etc.
So, I got a Chinese carb for $16 on Ebay. Replaced the carb and
the hoses. It started on the first pull. Ran great, ran with the
choke off, seemed at least as fast, maybe faster than ever before.
Used a whole tank of gas. Two days later, refueled it. This time
it was harder to get started, I think it might have started finally
on full throttle, but I got it going and it was fine. It had been
idling just a little slow, so I did turn the idle stop screw in one
or two turns to make it idle a little faster. Used it 15 mins.
Went to start it again, won't start. It has spark. Tried starting
fluid, no go. Let it sit overnight, plug out, tried again today,
no go. It won't fire even once. I also tried it with a new spark
OK, so here's the question part. I put my finger over the spark
plug opening and cranked it. I can feel a little suction, but
never any pressure. That sounds like trouble, yes? I'm not as
experienced with two cycle engines, but I would think when pulling
the cord, it should try to blow my finger off on the compression
stroke, yes? Valve stuck? kaput? just get a new one?
On Wednesday, November 22, 2017 at 3:02:46 PM UTC-5, firstname.lastname@example.org wrote:
Yes, I had the spark plug out, grounded with a jumper and I see spark
when I crank it. Am I correct that there should be some pressure
trying to push out when I crank it? I can feel some suction pulling
in, but nothing trying to push out. Not sure how those 2 cycles work,
they have the exhaust port open for part of the upstroke to push the
exhaust out, but then it's supposed to close for the latter part of
the up stroke, right? I never tried checking for compression with
my finger, but seems to me that it should be trying to blow my finger
off and it isn't. Can those valves get stuck? I guess I'll look for
a video on how they work and come apart. Can't be too much there.
I just use my Ryobi 18v battery powered blower. It usually takes one to
two batteries to get either the front or back yard leaf blown, and they
re-charge in about an hour. It's lightweight, and has an option to use
a plug-in to electricity option, but I've never needed to use it.
Had similar problems with my 2 cycle leaf blower from day one (I think,
Homelite). I even built a special tool to adjust the carb which got me
through several years of use. Finally it wouldn't go at all, so off to
the store. I bought a 4 cycle Makita. This was last fall. it's
fantastic, light weight and starts easily. A few weeks ago my wife
wanted to use it for the 1st time since last fall, so she brought it to
me to start. It started on the 1st pull with last year's gas. Amazing!
I really hate 2 cycle crap.
On Thursday, November 23, 2017 at 8:51:32 AM UTC-5, Art Todesco wrote:
I even built a special tool to adjust the carb which got me
And there's a big part of the problem. The hippies have made it so you
can't adjust the mixture screws anymore. I had issues with mine from the
start, I remember trying to decide whether to take it back. At times,
it would run better on half choke, start to die out with the choke off.
It did it right from the beginning, to some extent, got worse after a
year or so. If I could have adjusted those damn mixture screws, a
simple adjustment would likely have it running proper. So it ran that
way for years, and I'm thinking running with half choke probably contributed
to more gunk forming in the cylinder.
Just for reference, the cheap Chinese carbs are exact duplicates, I thought
maybe they would have screws you could adjust, but they don't. There must
be some penalties that even the Chinese are afraid of. Yet, there must
be tools for the repair shops, no? Where do they get them? Do you have
to have a license, photo id, and go through a background check to buy
And then there is the irony that the hippies must think that everyone is
going to go screwing with those screws to make them pollute more, when
they don't have to. Actually, IDK of anyone who will screw with it,
unless it's already not running right, So, they prefer you let it run
screwed up, polluting more, instead of adjusting it so that it will run
right and cleaner. Go figure.
Finally it wouldn't go at all, so off to
Thanks for the tip. I may be there soon too.... Sigh....
A few weeks ago my wife
On Thu, 23 Nov 2017 08:34:39 -0800 (PST), trader_4
If this is the standard Walbro carb there are 2 adjusting screws but
they have a funny D shaped head and you need a special tool to adjust
On the old chain saw that I nursed along far longer than I should, I
cut slots in those screws with a small hacksaw. Later I just bought
the $5 tool.
On Thursday, November 23, 2017 at 12:20:20 PM UTC-5, email@example.com wrote:
Have a Walbro and the Chinese knockoff of Walbro. Looks like they
are very fine male spline, definitely not D shaped. I'll take a look
on the web and see if someone is selling them, but I suspect the hippies
have the usual legal routes shut down. But it isn't the problem right
now. That Chinese carb worked great, until it wouldn't start and if
I fix the compression issue, should be A OK on the carb. Or it could
be going in the trash if I can't fix the piston ring issue.
There are several of the "special" screw heads. Susppose to keep just
anyone from adjusting them to meet the government polution standards.
some you can buy the tools for , for one type I could not find a place
that was selling th tool, so took my Dremal tool and cut a slot in it
for a regular screwdriver.
On Friday, November 24, 2017 at 8:26:37 AM UTC-5, Art Todesco wrote:
Update. I took it apart, all the way down to the piston. That piston
ring sure was stuck in the groove. I removed it, used a tiny screwdriver
to scrape the ring groove clean, cleaned the gunk off the piston with
steel wool, cleaned the ring. Put it back together and it started right
up! I ran it for about 5 mins, will use it to blow leaves later today
I thought I was doomed when I stripped the nut that holds the blower
wheel on. I had to saw it off and that further buggered it. There were
no threads left where the nut had been on. But I got luck, there were
threads further out on the shaft, enough to fill up a nut. So, I found
a scrap nut that was one size large, used that as a spacer, so the holding
nut goes on further out. Worked like a charm.
Unless you hear otherwise, assume she's fixed and working!
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