Chainsaw run problem

ed · Joined: 01 Aug 2007 Posts: 1

I have a Homelite 330 20" saw. It is very hard to start and cuts out
frequently. It can run at high speed but can not run at idle speed. I
have done the following in hopes to fix the problem. I cleaned the
carburetor and reset the hi/lo speed adjustments according to the
manual. The carburetor was dirty but I did clean it well. I set the
idle adjustment also. I clean the fuel filter and checked the fuel line
for cracks. It looked good. I was getting good spark but I still
replaced the spark plug. I cleaned the air filter which was also very
dirty. None of these fixes fixed the problem. I really think it's a
fuel/air mixture problem. I can keep it running by getting it to run
rich, ie turning out the lo speed screw. One thing I did notice was
that the foam gasket for the carburetor and air filter is very worn.
I'm thinking maybe air is bypassing the air filter and getting to the
carburetor chamber. Would this produce these symptoms I am seeing? Can
anyone think of anything else that could cause this problem.

Thanks

Archived from group: alt>tools>repair+advice

Brand "X" · Joined: 01 Aug 2007 Posts: 1

More than likely it is the beat up air filter..... But there's something
that might be so obvious that you may have missed it..... Check out the
gasket between the carb and the air filter.....(That's one of my
favorited stunts, is to neglect to put it back in after I'm done
cleaning the air filter). And make sure the 'rubber boot" between the
air filter and carb doesn't have a hairline crack in it....

If it's air being pulled through a crack, it'll make it hard to start,
and it'll almost refuse to idle. And you might consider a carb rebuild
kit.... It'll run you about 25 bucks...

Good luck!

Jeffery Davis · Joined: 01 Aug 2007 Posts: 1

You can easily replace the gasket between the carb and air filter or just
clean it good with cab cleaner let it dry and use silicone gasket sealer
replace. But I doubt this is your problem the problem is the low speed
carburetor circuit is clogged these can be had to get cleaned out I use
small pieces of wire to "rod " out these passages and then compressed air
and alternative is to use a good carb cleaner with a straw on the nozzle to
clean out these small passages but the carb cleaner really only replaces the
compressed air for the most part. I have had good results with Valvoline
Synth Power carb cleaner and poor results with gumout. the proper way to use
cab cleaner is to soak the thing like squirt some in the passage till it
comes out the other end let it sit a few minutes then do it again a few
times rather than blast a lot through at one time give the cleaner times to
eat at the gunk . Some people have had good results with adding SeaFoam fuel
additive to their gas. Which reminds me did you clean out the fuel tank
itself ? if not do so with either alcohol or dry gas you can use 91% rubbing
alcohol if it's cheaper but don't use the 71% .

Good luck

Damian Appert · Joined: 01 Aug 2007 Posts: 1

yes, gas that's older than a few weeks will cause this problem. Always use
fresh gas in a chain saw.
"ed" wrote in message @l41g2000cwc.googlegroups.com...
>I have a Homelite 330 20" saw. It is very hard to start and cuts out
> frequently. It can run at high speed but can not run at idle speed. I
> have done the following in hopes to fix the problem. I cleaned the
> carburetor and reset the hi/lo speed adjustments according to the
> manual. The carburetor was dirty but I did clean it well. I set the
> idle adjustment also. I clean the fuel filter and checked the fuel line
> for cracks. It looked good. I was getting good spark but I still
> replaced the spark plug. I cleaned the air filter which was also very
> dirty. None of these fixes fixed the problem. I really think it's a
> fuel/air mixture problem. I can keep it running by getting it to run
> rich, ie turning out the lo speed screw. One thing I did notice was
> that the foam gasket for the carburetor and air filter is very worn.
> I'm thinking maybe air is bypassing the air filter and getting to the
> carburetor chamber. Would this produce these symptoms I am seeing? Can
> anyone think of anything else that could cause this problem.
>
> Thanks
>

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