Bazman39

I have three problems with my "sprint 40"(model100902) briggs and stratton powered (push) lawn mower.

1/even with a new spark plug I'm having problems with starting.

2/when it eventually starts the engine revs then dies off continuously

3/ as well as problem 2 she also has a mechanical sounding rattle coming from the engine which is quite concerning.

any help would be appreciated.......Thanx.;