In the power department, the OS 1.60 is not a match for the Webra 1.60 (if you could get one). However, the OS is easier to handle, even when considering the setup mods that turn it into a reasonable Pattern engine. When a Webra 1.60 was set up right, it was a wonderful thing to behold. When it wasn't right, it could bite you hard. The OS is fairly easy to get going with a VP30 pump tapped into the backplate, and with close attention to the low end needle being adjusted right.You just need to remember that the carb on the OS was never meant to run in a pressurized fuel system, so it will definitely flood in the low end to mid range if you don't crank the low end needle way down.

When using a pump, for starters, you want to completely close the low end needle, and then open it up just enough to let a little air through when blowing through a tube connected to the carb intake. Thatshould be less than 1 turn open. Once you get it started, run it above mid-range, for a few tanks, usthe pinch method and so forth to make sure it's rich enough, and then start messing with the low end needle at and below mid-range. If it loads up and stumbles when re-opening the throttle, then you need to close the low end a little more until that stops happening. If instead it tends to stay up in RPM a bit and sound whiny/tinny (andif it tends to get hot)as you close the throttle, then the low end is set too thin. If it quits, but not from loading up with fuel, try opening it up a bit. If should not be dripping a bunch of fuel, or obviously, it's too far open. Be patient, you have to develop an ear for the right sound.


Or, as 80% of everyone else will tell you, you could just go electric...