Weedwackers and leaf blowers should be battery or manual.
How about starting an on line petition to either Honolulu city council or state legislature?
Quieter O'ahu Response:
Thanks for the note. There has been a lot of legislative discussion over the past few years about weed trimmers and leaf blowers. Opinions were heard from all sides, and although the overwhelming majority were in favor of a quieter solution, battery or corded electric, the legislature once again sided with the industry and passed legislation that only limited the times of day that these noisy gas-powered tools could be used.
We do from time to time conduct email and petition campaigns where we ask our subscribers (now 200+ and we just added your name) to sign petitions or to directly email their city council or legislature. We have the gas-powered landscaping tools on our to-do list and will in the near future see if there's again an opportunity to petition the legislature for better laws and enforcement.