ORIGINAL: ppkk
This is the noob forum so I don't feel too bad asking this question: where is the spray bar in a four stroke (.91 ASP)? Is it basically where the high-speed needle enters the carb inlet?
With that question out of the way, here's why I am asking: I am installing the above engine in a Big Stik 60, and I have two ways of installing the engine. If I install the engine upright, then the spray bar (assuming the location is as I described it above) would be about 1.5'' above the tank center line. If I turn the engine 90 degrees, then the spray bar would be between 1/2''-3/4'' above the center line so that's probably the better set up. I just want to ensure I am measuring the location of the spray bar correctly.
Thanks.
On the ASPs I've seen, the center of the carb's rotating throttle drum is your reference point. That's actually true of all engines, even when they have a remote needle valve. Where the fuel is introduced into the intake air is the reference point.
Your idea about bhe better setup is spot on, mate.