diamondred 63 #1 Posted July 20, 2014 I purchased a 1991 520H today, and after I was able to get it running, I noted that with the air cleaner top off , there was quit a bit of noise coming from the breather tube (w/pcv valve). I put my finger over the hole , and the noise stopped. So I shut it down and reassembled the air cleaner thinking the noise would stop after reassembly. NOT. Don't seem to be as noticeable at mowing RPM. Is it as simple as replacing the valve? Fix ? , upgrade? No... I'm not going to keep my finger in it.... Share this post Link to post Share on other sites
rick 216 #2 Posted July 20, 2014 I have a 416-H w/a P216G Onan, and it makes the same noise you describe. I think it is a normal noise, and don't worry about it. Share this post Link to post Share on other sites
