Jeffy

Ryobi recommends the Champion RDJ7Y spark plug for thier 31cc engines. You my be able to find some at your local small engine shop. I found mine some at Walmart last year $3.60 each. You can also order some from http://www.outdoordistributors.com/parts.html. Just go to champion and input the plug you are looking for. You will have to pay shipping. I have just ordered 4 plugs from them and the shipping was $3.95. I hope this helps

Thanks