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Briggs+S lawn mower engine

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John Donne

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May 3, 2010, 10:29:16 AM5/3/10
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Bit of a long shot but
My dad has a B&S rotary lawn mower he has taken the carb off because it was
not running properly
but now cannot remember where the two springs that control the speed should
be fitted on the carb. is anyone familiar with this engine.


Brew

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May 3, 2010, 12:32:58 PM5/3/10
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Mungo "Two Sheds" Toadfoot

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May 3, 2010, 1:58:13 PM5/3/10
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"John Donne" <JD9...@hotmail.com> wrote in message
news:_4BDn.23050$fQ1....@newsfe13.ams2...

Which engine? If it's the Classic 35 I've got one. Two actually.

Si


Mark

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May 3, 2010, 5:48:49 PM5/3/10
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John Donne wrote:

I wonder if you have any idea how many different engine types Briggs and
Stratton have made over the last 60years.
However as its a rotary and has two governor springs it's quite possibly
like this.
http://i41.tinypic.com/zn0tib.jpg
(found after a quick Google)
But note the top spring in this pic is fitted incorrectly
the left hand side of the top spring should attach to the same point as the
lower spring, on the left hand side.
also if the carburetter has been stripped because of poor running, the
diaphragm and gasket between the carb body and fuel tank should be replaced.

-


John Donne

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May 4, 2010, 1:19:31 PM5/4/10
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"Mark" <Ma...@127.0.0.1> wrote in message
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Thanks i will post him the picture I think that's the correct model.


Gio

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May 6, 2010, 12:00:10 PM5/6/10
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"John Donne" <JD9...@hotmail.com> wrote in message
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I take it that the photo also shows the priming section but without the
rubber bulb. Does anyone know how to stop the priming bulb being sucked in
during use? I can prime the engine ok but run it for a short while and the
bulb gets pulled in. You stop the engine and the bulb eventualy returns to
its normal position but once more gets pulled in with the engine going.
:-(

Thanks,

Gio
>


The Natural Philosopher

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May 6, 2010, 4:53:53 PM5/6/10
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ah. Then you have a blocked air admittance hole in the fuel filler cover!

> Thanks,
>
> Gio
>
>

Mark

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May 6, 2010, 5:41:41 PM5/6/10
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Gio wrote:

unscrew the fuel tank filler cap a few turns when it happens and see if the
primer bulb returns to normal.
(the primer bulb is just out of shot at the bottom of that picture)

Gio

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May 6, 2010, 6:47:41 PM5/6/10
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"The Natural Philosopher" <t...@invalid.invalid> wrote in message
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Sorry I should have said, I tried that without any luck.


The Natural Philosopher

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May 6, 2010, 6:50:25 PM5/6/10
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then you have a blocked fuel feed

Gio

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May 6, 2010, 6:56:00 PM5/6/10
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"Mark" <Ma...@127.0.0.1> wrote in message
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Thank you but I did try that, thinking that the cardboard type washer in the
lid had sealed to tank but with it removed it did not make any difference.
I found it odd I could pump the bulb and inject petrol into the throttle
body. (removed airfilter to see). You can pump it 10 or more times and the
bulb return as soon as you remove your finger.
I think I will have no option but strip the carb down and see what is
inside.


Gio

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May 6, 2010, 6:58:52 PM5/6/10
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"The Natural Philosopher" <t...@invalid.invalid> wrote in message
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Ah, do you think there are two fuel pickups from the tank? I was just
thinking there was one hence I was confused re being able to prime the
engine.


Mark

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May 6, 2010, 8:04:05 PM5/6/10
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Gio wrote:

>
>
>>
> Thank you but I did try that, thinking that the cardboard type washer in
> the lid had sealed to tank but with it removed it did not make any
> difference. I found it odd I could pump the bulb and inject petrol into
> the throttle
> body. (removed airfilter to see). You can pump it 10 or more times and
> the bulb return as soon as you remove your finger.
> I think I will have no option but strip the carb down and see what is
> inside.

youtube video of what to expect, but�its a good idea to replace the
diaphragm and gasket, they are only few pounds.
http://www.youtube.com/watch?v=Gg4OWXW520k

Gio

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May 7, 2010, 5:10:02 PM5/7/10
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"Mark" <Ma...@127.0.0.1> wrote in message news:UNIEn.27$i6...@newsfe19.ams2...
Thank you all for your help and special thanks to Mark. I never thought of
youtube as an educational site so just goes to prove you learn a new thing
every day :-) that video clip is ideal and prep for tomorrows job.

Thanks again


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