Originally Posted by
AeroFinn
Hsukari and blw
Thanks for your comments. 1/32 of a turn equals about 5 minutes? right? No way I can lean the engine that much it will die on acceleration. But to be honest I do not have any issues with 2300-2400 rpm idle as my pitch is 6" so I can slow down on landing nicely. I also think the Aerosave being extremely good with it's lubinq qualities the side effect is it takes a forever to get the engine run in. I mean, really run in.
So to sum up I think those people how say "I never or very seldom need to touch the needles of my engine" are those fellow modellers who are happy with good performing engines but do not expect their engines to run perfect every time on the field.
Any Saito should be able to idle reliably at 2000 to 2100 rpm on 15% and an APC prop. I just mention APCs because I'm used to them. My 125 has an APC 15x6 and it took a while to get it to idle where it should. I have a 72 that I've had set for 1900 rpm.
I disagree about tuning often. I had a 56 that I flew 2 years and never touched the needles. It ran like a Swiss watch every day, summer, winter, and everything in between. But, you have to have the low speed dead solid perfect to do that, imo. I also had my 72 set where I never thought of touching a needle when I got to the field. Just fill it up, crank it up, and go enjoy flying. I bought a used 91 from a guy on RCU and when I ran it on the bench I could tell that engine will probably run for years without ever tuning anything. The owner had it perfect.