It still sounded great my friend. Thanks for posting and big salute from Slovenia.

David, any day working with these little wonders is a great day. I have a Webra 40 Speed, and a YS 120 that has tasked me. David, thanks for coming back!

Great to see you back dave, that FSa engine series is one of the best in my catalog. Beautiful casting work on it, on to the next run!

Always enjoy your engine videos , that's a monster f/s engine , did a number on the spinner ! Sounds great , keep up the good work !

O'Man that is a nice engine ! Subbed up about a week ago and been watch'en your vids .. ENJOY THEM ALL !!

When you mentioned a Wrath of Khan quote I was thinking “time...is a luxury you do not have” lol. Anyways, nice run Dave. My only experience is with an OS 61SF-P. Runs slightly different but great engine.

Great!

Perfect day for an engine run! Is there anything that says it needs to be primed or purged of air? Btw you can hear some detonation from 5m30s but that was after the plastic spinner started disintegrating. Maybe pumped engines need to be coaxed a little more gently with the needle? Not sure myself... Looking forward to round 2!

i went thru something like that breaking my magnum, fs180 , with carb settings. it ended up being a nice running motor. thinking about selling off my magnum motors.

If is brand new, the engine needs a good breaking procedure, at least two full tanks, big four stroke engines needs at least 10% nitro to run properly and stable at low rpm, I have a O.S. FS-200S pumped that is a beast, run 20x8 propeller at 7.500rpm, 12% nitro.

Look at 5:20, there is when the spinner was broken.