Originally Posted by
corvettez06
This is my first gas four stroke engine (actually first four stroke for that matter) and the instructions give a ground rpm range of 2000-9500. I am using a K series 14x6, high speed needle is out 1.25 turns per manual and it runs excellent except I am nearing 11000 rpm at full throttle. I only did this once because of the fear of over revving it.
Are the high speed needles onfour strokes, whether gas or glow, supposed to be adjusted not to exceed the rpm range (9500 in this case)? Or should they be adjusted similiar to a two stroke and back off a little after reaching max rpm?
I've got the FG-21 and run the MAS K Series 16 x 6 and it pulls really nice. I can't remember the RPM at full throttle but I think it was around 9500 RPM or so. 11000 RPM seems really high for a 4 stroke, I'd use at least a 15 x 6 to avoid damage to the engine.
I love my Saito FG series though, what a great engine. Also want to mention that I run mine a little on the rich side also.