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Posted by Manjo on May 3, 2008, 1:05 pm
> wrote:
>
>
>
>
>
> >The earlier thread WAS getting too long and awkward.
>
> >I had a question on the spark arrester: =A0the closest thing I can find
> >is a slotted "cap" on the muffler that can be adjusted to direct
> >exhaust. =A0My muffler is similar to the one on page 19, reference
> >number 300D.
>
> >http://home.comcast.net/~manjo1111/B&S_Engine/MS2810%20ILLUS%20PARTS%...
>
> >The difference is, after removing the deflector, reference number 676,
> >the cylindrical muffler is one welded/soldered piece. =A0I can easily
> >blow 15-psi air through the muffler so I'm assuming it's not clogged.
> >Is this a safe assumption?
>
> >I also soaked the carburetor in Berrymans B-19 carb cleaner solution
> >for about 2 hours with no improvement. =A0The bike still takes several
> >pulls to get it started and it has to run at 1/2 choke until it's
> >warmed up enough to run with no choke at all. =A0The engine still does
> >not run at 100% speed even after it's warmed up.
>
> >Just a quick summation for anyone tuning in late: =A0thoroughly cleaned/
> >blew out carb with compressed air, replaced diaphragm, cleaned pick-up
> >tube. =A0Replaced carb gaskets to engine and to gas tank. =A0Thoroughly
> >cleaned out gas tank. =A0Cleaned and re-installed magneto at proper
> >setting/height from flywheel. =A0Changed the spark plug twice. =A0Oil
> >filled to top of filler hole. =A0Compression is 75 psi. =A0Rough leak dow=
n
> >test goes to 100 psi with no audible leaks.
>
> >I connected a spark gap tester between the spark plug and the cable.
> >I was able to start the engine and run with the tester in place set at
> >approximately 0.030 inches. =A0I get a bluish-orangey color spark across
> >the gap. =A0As the engine slows down, the spark breaks into two orange
> >lines with a little blue now and then. =A0Since the engine runs at good
> >speed with a more blue than orange in the spark, I'm assuming the
> >orange color is there because the gap tester is taking away some of
> >the current.
>
> >Thanks,
>
> >Manjo 1998 Briggs and Stratton "L" head engine on a Giant-Vac leaf
> >blower
>
> The orange weak spark, would make me look at the magneto for
> replacement. As I recall; a magneto will weaken, so will the spark.
> This is not a total failure of the magneto, but a slow death.
>
> Check for cracks on any wires, also. Just me :))
>
> I suspect the coil on the magneto has a hairline crack, but they can
> be difficult to detect.
>
> Older cars with cracked coils would run fine, but the day it rained
> and the coil was hot the cracks expanded =A0to allow moisture in the
> coil =A0that killed the engine.
>
> A simple thing is to check the plug terminal. Some firing problems can
> results from a =A0damaged wire. Simple snip the terminator off and
> replace it.
>
> Thanks for the update. I would like to hear the end results.- Hide quoted =
text -
>
> - Show quoted text -
I'll try that. I think I have a couple of spark plug caps I can use.
Thanks, Manjo
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