sparkplug question

[pickupporter]

I thought I bought a box of Bosch WSR6F but a got WSR7F. Should I try and return them on E-Bag or just use them in all my equipment anyway? It's just a hotter heat range, right? (saws, leaf blowers, ice auger, string trimmer)

 

[Marshy]

Edit, Bosch web site isnt very clear... 7 is hotter than a 6 according to this site... http://www.sparkplugs.com/learning-center/article/225/heat-range-conversion-chart

Might not have any issues if your F/A ratio is rich enough but if its too hot or you get some lower grade fuel it might cause preignition and cause engine damage.