All my engines are Evolutions. I own a .46NT, a .46 NX and a .61NX. Don't believe what you read in the manual. Get a Engine Stand or put it in your plane and BREAK IT IN!

I had to rebuild my .46NT engine and replace both front seal... front and rear bearings less than a year when I ordered the engine. And I always go a little rich when I run my engines.

Always break in your engines... or they will break on you.