Contribution d'origine par : Vince ,
After reading this post - I decided to add two 24volt DC fans. My goal was to do limited alterations to device, so I may return this after the mowing season for repair. Its brand new and overheated within one hour of use! The unit has a ton of power comparable to my gas Husqvarna. Here are some pics of my solution. [image|2143858] [image|2143859] I cant really give you a detailed parts list as I used items I had in my shop. * Grey plastic tray out of a “Husky” tool box from Home Depot * Micro Rocker (SPST) switch * [https://smile.amazon.com/dp/B07Q5R9HF4/ref=cm_sw_em_r_mt_dp_U_VLH9EbYTDM7FH|24 Volt Fans] (used 24volt vs. 12 so they could handle the 18 volts w/out adding resistors) * Misc screws * Wire ties * Foam rubber door gasket material (placed on inside edge of plastic container to make more airtight) I soldered the wires to the (- +) tabs (internally) that come in contact with the 18 volt battery. Then ran the wires out of a vent slot. Used two wire ties to go through vents to secure to the tool with out need to screw into tool. Tool has not overheated since . An alternative to using the rocker switch is to add a Micro Limit Switch Long Hinge inside to start fan when the safety lever is depressed on Ryobi (there is room for a small switch) BTW I see they have discontinued the unit [https://www.homedepot.com/p/RYOBI-ONE-18-Volt-Lithium-Ion-Brushless-Cordless-String-Trimmer-4-0-Ah-Battery-and-Charger-Included-P2090/300339420|Homedepot String trimmer] Good luck!