Motor shuts off

[nudnik3000]

I have a mercury mariner 9.9 n

I have a mercury mariner 9.9 not sure what year.It slows down from full throtle to nothing even when i have it pegged.It also shuts off after small backfire when idoling.What should i check?}

 

[beckerjs]

"back fire means its running l

"back fire means its running lean, either from lack of fuel, dirty carb or miss adjusted carb. try pumping the bulb at lower speed and see what happens. check compression and spark."