Jonno wrote:
THE Brigs and Stratton Homepage and Faqs
http://faqs-rowen.custhelp.com/cgi-b...&p_page_foot=1


Gday Len (and Terry),
The mower "wont start on full throttle" sounds less than a full overhaul
to me.
The basic stuff is usually all that's required, without going into the
heavier stuff.
(Depending on its history of use of course.)
As he's only starting at the edges, it may be going in too far, which
may make the mower unserviceable.
What you mention is wise of course, but only if the basic preliminary
check reveals that those issues I mentioned previously are not the problem.
As I have previously worked on mowers, I know most problems relate to
these issues of fuel, air and plugs. If those are OK, then your
suggestion of going in deeper is needed. Pulling a carby out, can make
it difficult to put it back again, with many springs and things to get
the average person confused without a book. Making a drawing of this, in
this case helps for the beginner. Even then, experience is needed to get
it to run properly once again.
Valve grinds and re ringing is easy enough, but also requires some prior
experience to understand what is worn and what isn't. Even at 20 years
old he might get by without this. Valve guides could be a problem, and
this is most common. At around $300 to $400 a new 4/S mower may be
prohibitive, so its still worth doing.
Warning disagreement(Two ways to assemble a carby ARRRGH! I know many
ways, having seen many ways of screwing the carby, and only one way of
getting it right.) Put all parts in small container Do not loose
anything...
Anyway there are some website to help you if required
http://www.repairfaq.org/samnew/lmfaq.htm

No good reinventing the wheel...



len garden wrote:
g'day terry,

might only need a simple carby overhaul to replace the diaphram. now
the big question can a handy man do that task, well it will depend on
your mechanical expertise as there are only 2 ways to reassemble a
carby 1 is the right way the other is the wrong way, and yes some
damage can be caused to either the carby or the new diaphram.

as for re-ringing again not a super difficult task so long as you can
remember how things came out so they go back together exactly the same
in reverse.

our b&s motor is touching 23 years old now been swapped from its
origianl frame to another now back again, had the carby replaced with
a good second had unit, had a couple or so diaphrams in the carby
probably ready for another? starts with little effort on the second
pull sometimes the first seldom the third.

gave it an obligatory valve grind about 20 years ago, uses no oil
blows no smoke, be well worth putting in a set of those chrome
segmented rings b&s used to supply dunno if they still do?

but if you were to pull it down for a re-ring and the bore is worn
without any scoring then see if they still ahve those segmented rings
and put a set of them in, oh you will definately need a ring
compressor to hep fit the pisotn with new rings back into the bore,
but they are the way to go.

run them on straight sae grade oils i like nothing under 40 generally
50 can use 60.

On Mon, 05 Mar 2007 11:11:46 +1100, Terryc
wrote:

snipped
With peace and brightest of blessings,

len

--
"Be Content With What You Have And
May You Find Serenity and Tranquillity In
A World That You May Not Understand."

http://www.lensgarden.com.au/