That looks like quite a late model Briggs on that mower. So it should be a long way from worn out.
Model, Type and Code numbers off the cowl will allow us to date it, if you like.
Any particular reason you want to replace it? Not that a Honda isn't a far better engine; just that this may not be necessary.
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..."
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