has my strimmer died?

was out streaming very tall long grass for around 4 hours last week when my strimmer cut out.. thinking it was out of fuel as i lowerered the strimmer i noticed smoke coming from motor ..... and could smell something was wrong .. thinking perhaps it was an overheating issued i left it to cool ....few days later unable to start, feels heavy pulling starter cord.. any ideas or has my trimmer died...