*/ Reply #1 on: December 23, 2010, 08:46:40 AM . The C in RC is for "Comfort", which means it's an easy start model. Less than one year old. IDRY Vacum Kiln, LT40HDWide, BMS250 sharpener/setter 742b Bobcat, TCM forklift, Sthil 026,038, 461. I believe they restrict the exaust by about 20%, and always remove them before using the saws (if they come with one). They come from various sources.Ships in 7-10 Days. If you feel lack power, buy another chainsaw with desired power. on Chainsaws, Started by keppoch Expert operators can experience the differences easily. The screen in my Poulan 2800 seems like it would be very restrictive and I would definitely like to make it a greater diameter with more surface area if possible. You will also learn how to remove the spark arrestors properly. After using your machine for a total of 25 hours, it is time to clean your spark arrestor. May 3, 2011. The MAIN reason your chimney spark screen will clog is due to excess moisture in the wood you burn. 0 Members and 1 Guest are viewing this topic. They're there to stop the engine from throwing stray sparks and starting a fire. Then remove the muffler cover with the help of a screwdriver. No start, not even a cough. //-->,