trimmer wont start?

John Deere weed trimmer ran out of gas. refilled tank with same gas that was in before. would not start even after primming. checked plug and looked dirty so replaced. still no start, plug is "wet". was suggested that a new plug cap was needed as it seemed to be not getting enough spark to start. repasir shop says likely needs new module and cost for repair wouild be more than cost to buy new trimmer. any suggestions??