fluids changed twice, contact cleaner and wiring harness check done, seafoam in fuel tank and associated running of unit complete, inspection of engine mounts done, load tested at 100% for 3 , two hour sessions, minimal fumes seen from exhaust if you really look hard from different angles, might be associated with the 30 degree weather. blow by resolved by adjusting slight oil overfill and perhaps the use of 5w40 instead of 15w40 by changing back to 15w40 and watching oil level closer. unit does vibrate as noted by oil fill cap chain but as I am told this could be normal. it is trailor mounted and maybe this contributes to the vibrations and more so the rattles. all in all I think I am good to go. almost forgot, I have read all the TM's at least 2 times and every applicable post. Learned a lot from both sources as well as comments to my posts. thanks again