Ray Bennett
ArboristSite Guru
I am finally getting around to opening up the muffler on my 660 which is the newer version with 1 small exhaust hole and no foam in the air filter. I have researched a lot of post on this subject but have a few questions. First can I get good results by simply opening the existing hole to .63 inches or will dual porting still be a lot better. If I must dual port it for best results what size should the holes be. Finally will I have to remove the limiter caps to richen the saw up enough with this minor mod?
Keep in mind I do not want to buy the factory dual port cover because in my opinion it is over priced and does not look good. I would prefer to keep the exhaust flowing 1 direction for felling purposes but If a Dual port will keep my saw running a little cooler and more powerful I will go that route. Thanks for the help.
Keep in mind I do not want to buy the factory dual port cover because in my opinion it is over priced and does not look good. I would prefer to keep the exhaust flowing 1 direction for felling purposes but If a Dual port will keep my saw running a little cooler and more powerful I will go that route. Thanks for the help.