ORIGINAL: opjose
ORIGINAL: jetmech05
Despite what you may hear or read there is no need to run 30% heli fuel or 4 stroke fuel....15% Omega works just fine
15% is overkill ( not that it hurts ) for the larger four strokers, unless you fly from higher altitudes.
All of mine fly just fine on 5%, though I typically use 10%.
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BTW: I find the Saito's easier for a beginner than the OS in the four stroke arena.
Both are great engines, but the Saitos are REALLY tolerant of grossly rich settings and will run that way all day long.
Do the same with an OS and the engine will quit, usually in flight when you throttle down for a second or two....
Typically if you can get the Saito started, it will fly that way, though not at best tune and it will consume copious amounts of fuel until properly tuned.
I've also had fewer problems with the exhausts and mufflers coming loose for some reason, on the Saitos. The OS mufflers and exhaust headers require that I drill and tap a set screw more often than not. Dunno why.
Run the OS until hot then tighten the nut. Not warm but right after landing. Mine have never just come loose and I use nothing on them like a lock of any type. I do like OS pumpers but if you requir a new diaphragm the carb has to be sent to OS, they won't just sell you the diaphragm. Cost of reapir with shipping was around $40.00 for a $2.00 part. Just one more reason I use YS, they sell every part for the engines and trust you enough to replace a part. The rich running of the saito is just one of the reasons I don't use them, I call them snot machines. Tune an OS and it stays in tune and is cleaner running.