Ok .it looks like near the fuel inlet nipple there is a number WGA 9A then just below that 546. About 1year or so I contacted the new BME owners ,Tom? maybe ,And after I sent them My original paperwork for when i bought it ,they sent me the so called fix for it, the nylon reed block,they now have an aluminum one? that makes this one obsolete? I was one of the first people to buy one of these from Keith,My plan was to put it on a Ziroli Bearcat,but its still on the back burner,but I have an Extreme Flight 110 in. Yak that might like it,it curently has a DLE111, on it just because I didn't want to have a flame out with the BME if the fix didin't work, and the ignition is the old Falcon. I am thinking about just sending it back to BME and have them update it and make sure it runs fine. I have never started it up yet. because right after I bought it there were people having problems with them.This was,....is my first BME engine also.I am undecided what to do with it? I know the DLE111 I bought is done with the break in oil on the YAK I can get 6300 rpms from the dle on the ground with a vess 28A..anyone have any suggestions for my BME? Oh by the way I bought mine 3-28-2007 from Cheif RC