Kevbo 81 #1 Posted February 25, 2013 Hey guys I just got a GT-1800 today and I noticed that when the engine is running I don't hear much of a knock but when I turn it off...as the piston slows down I hear a very loud knocking especially though the air intake with the filter off. Without hearing it do you guys have any best guesses? Thanks in advance for any input! Share this post Link to post Share on other sites
