View Full Version : Evo 50. Wont spool up
OzarkCopterBum
04-10-2006, 04:06 PM
Flew 3 tanks just hovering and forward flight and when I started up for tank 4 it just sat there. Engine is running and I havent had any hot starts or other clutch problems. I took it up to about half stick and the blades never moved. I took the engine out and theres still alot of clutch liner and no obvious damage to the clutch.
Is this the one way bearing failed or what else do I need to look at?
BarracudaHockey
04-10-2006, 04:13 PM
Sure it wasn't running backwards?
OzarkCopterBum
04-10-2006, 05:15 PM
DOH!
Uh no, I never thought of that.
Now that you mention it it may have sounded funny. I'll put it back together and start it again and see before I order parts.
Mine started backwards the other day. OS50 sxh.
The only real problem was the blades getting smacked in the grips, when I throttled down and back up the engine belched and started running the right way at half throttle, and the governor kicked in. Was scary.
OzarkCopterBum
04-11-2006, 10:25 AM
Good call Barracuda!
I assume it was running backwards. I got home yesterday and reassembled and it fired right up and hovered like it always has. Probably ran better as I noticed some residue where the muffler had a pinhole leak.
When they run backwards do they intake through the muffler and exhaust through the carb?
I'm not a motorhead and its hard to get my brain wrapped around that.
BarracudaHockey
04-11-2006, 10:30 AM
No the crank shaft just spins the other direction. No harm done, some of the plank guys mod one to run that way in a twin so it counters the torque.
Running backwards is usually a sign that your low end needle is too rich, try the pinch test, pinch the line while its idling and start counting, any more than 3 or 4 seconds before it starts speeding up and quitting and its too rich, if it quits at less than 3 its too lean but it definately sounds too rich if its starting backwards.
OzarkCopterBum
04-12-2006, 11:37 AM
Man, you know your motors. I've been tweaking around on the low end a bit now thats its warmed up. It was sputtering at half stick so I was trying to back it off a little. My plank compadres told me to turn it 2 turns. My reply to them was dont EVER touch my carb. hehe.