G'day folks,
Originally Posted by nath
Most likely a blocked up fuel screen, or the fuel bowl in the tank has water or rubbish in it.

There are briggs workshop manuals but most are printed, I've not seen them online.

That little spring doesn't do much, just takes the slop out of the throttle linkage. you're local mower shop should have one but last time i got one last week it was approx $15 for it
This. But just get a new diaphragm, while you've got the carby apart anyway.

The Briggs Repair Manuals aren't viewable online AFAIK, but PDF versions can be downloaded [free to ODK Subscribers] from
HERE

#270962, or #CE8069 if the engine is pre-1982, is the one you want.

If you can give us the Model/Type/Code numbers for the engine, we can point you to the Illustrated Parts List for it, and determine its date of manufacture.

These numbers will be stamped on the cowling, above the spark plug. A touch up with a wire brush will usually make them legible.

Cheers,
Gadge

"ODK Mods can explain it to you, but they can't understand it for you..."

"Crazy can be medicated, ignorance can be educated - but there is no cure for stupid..."