I have a DA-50R that runs strong and has about 2 1/2 gallons through it. The low end is a bit rich and the high end seems to be right on. There's a point on the throttle curve where a slight bump of the throttle pushes the RPMs up by about 1,200 RPM. I suspect the low end mixture is the culprit. Is it safe to lean out the low end to where it should be given I have under 3 gallons through it?

Thanks!

It shouldn't be a problem

About 2-1/2 gallons ago would have been about right.

[sm=lol.gif] You have to stop this SS. I'm cracking up here!!!

lol what SS is trying to say is.. you should tune your engine properly from the get go. You don't run.. er you are not suppose to run gas engines rich like a glow engine. Tune them properly from day one and leave it alone. More often then not engine companies recommend 32:1 or something for the first few gallons and then a higher ratio later... even this is sometimes questionable. Regardless of oil content you still tune it the same way from the get go.

Do a search of tuning and tune it properly and have fun.

You can tune it right out of the box. So yeah go ahead and tune it now, no problem.

Very cool! Thanks for the input. This is my first gasser and I bought the plane "used". The guy I bought it from said he set the mix rich for break-in. OK...I'll remember to not remember anything he told me

SS is crazy. Everybody know that DA engines are tuned at the factory for best performance, and we plebes shouldn't touch the needles!

Sorry, forgot the smily face!

I didn't get to the second post with the smiley at first and I thought for a moment you were trying to ruin that poor guy[X(] As for being crazy there are times I couldn't agree more Today everything looks to be ok but tomorrow is definitely in question.

OK...played with the settings today. I was able to lean it out a bit on the low end and none on the high end. Transition is smooth, idle is reliable. Seems to run good.

I'm still noticing quite a hump in the throttle curve. The motor does have a canister exhaust and this may explain things. It's kind of like a 2-stroke dirt bike with a pipe...the power is very peaky.

Also, is it common practice for the gasser guys to put access holes in the cowl to make mixture adjustments easier? I had to set my needles with the cowl off. I backed them off just a hair to the rich side to hopefully account for engine temp. When it cools off (it's 95* right now), I know I'll have to richen up the needles.