I have the .46 evalution engine that came with my alpha 40 trainer and as you may already know they comes with these nifty little needle limiters that prevent newbies from tuning the engine "to far". Well since I live at a high altitude area (central oregon), I have to lean my engine out quit a bit to get it running correctly. My flight instructor tells me nothing but complaints about the needle limiters and believe me he knows what hes talking about (he owns a hobby shop). So my question is, since I do know how to tune my engine correctly, should I take the limiters off for good, or just leave them on? If I should take them off, how, or can I have a link to a website that shows how to remove them?

Thanks in advance,
Tyler

Remove them and forget about them.

Throw them in the trash can ya dont need them!!

ok thank you. lol

Get a pair of pliers and get rid of them.

Ken

Yes. The needle limiter is just a roll pin stuck in the side of the knob. Just grab it and pull. My Alpha 40 engine ran great the first summer, then as soon as the weather cooled off, I couldn't get enough adjustment. I pulled out the limiter and it worked great.

I really believe that they should just have included a one paragraph explanation of needle valve tuning in the manual, rather than putting these "idiot proof" limiters on the engine. I really like the 3-D drawing that OS puts in their manuals.

Good luck.