Rick wrote:

wrote in message
oups.com...

Hello everyone! I have a Briggs and Stratton 3.5hp engine fitted to

a

Hayter rotary mower from the mid 1970s. The Model number is 92982

and

the Type number is 1640-01. It's a 4 cycle, single cylinder, L-head,
air-cooled engine for information.
The problem is I have had it sitting idle for 5 years as the starter
rewind spring broke and lack of time prevented getting it sorted
sooner. Last week I bought a new spring, rope, (approved

Champion/B&S)

spark plug and air filter foam element (old one was disintegrating,
saturated new one with oil and squeezed excess out), filled the sump
with fresh oil and put in half a tank of fresh 95RON unleaded.
So far, so good. But pulling the rope and some carburetor needle

valve

tweeking got the engine to start eventually, burning off the oil I

had

put in throught the spark plug hole. It then splutters and pops

(rich

mixture burning within the exhaust?) The spark plug has looks like

it's

not running lean (fuel/oil on it). It then cuts out (maximum of

about

15 seconds after starting). Then you can restart straight away. Any
ideas as to the adjustments I need to do (I have found I can start

it

and get it to idle very slowly with the throttle lever set to

minimum).

Do I need to play with the idle adjustment screw? Is there the
possibility that the carburetor needs new parts too? I've heard B&S

do

carburetor kits - how much would I be looking at (UK Pounds) and

what

parts do they contain - anyone ever used one?
I know this is a long posting, but i'm not too hot on my knowledge

of

getting carbs to work perfectly for a smooth idle.
Thanks in advance. (This email address is invalid because of

spammers

so reply on here).



From the model number, that's a vertical shaft model with a Pulsa-Jet
carb. The diaphragm kit usually sells for a couple dollars US.

The Briggs and Stratton web site should have the owners manual for
that model...



I had one of those years ago that i had a problem with.
As i recall, the carbs or fuel tanks mounted on them
warped causing fuel feed problems. At one time, there
was some sort of repair kit for this. Or, you
put a new fuel tank on it. I would start with a new
carb kit either way. Make sure too the keyway in the
flywheel is not sheered and the flywheel to keyway
position shifted.

Bob

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