912 ULS LACK OF POWER
in General Tech Discussion
9 years ago
-
by ERNEST BITTEN » 9 years ago
2007 REMOS G3/600 Rotax 912ULS 750 hrs on the engine, 60 hrs on plugs
Engine will not develop full power.
I went on cross a country over the mountains, engine worked great. Got home, put in 10 gallons auto gas from local gas station that we always use. 92 octane no ethanol.
Next day did a normal run up, engine would not go above 4200 rpm.
Drained some fuel. No water, gas looked good (a little blue from previous 100LL fill up before the 10 gallons of auto fuel)
Replaced throttle cables, replaced carb return springs, replaced fuel filter, and balanced the carbs.
Normal run up. developed 5000 rpm+ on the ground. Took off, and at about 300 feet AGL there was an abrupt drop in engine rpm to 4200 rpm at full throttle. I Landed.
On the ground I shut down the engine, I let it sit for a minute with the electric fuel pump on. Started up, normal run up, developed 5000 rpm+ on the ground, but after brief taxi it would only go to 4200 rpm.
HELP. Bad gas (not likely)? Bad float?
EGTs are about balanced. Maybe 100 degrees hotter on right front.
Cleaned both carb bowls, flushed fuel line from tank to fuel distributor block, drained and refilled gas tank. Problem corrected. Went flying 20 minutes at full and cruise power.
-
by Roger Lee » 9 years ago
Hi Ernie,
Glad it worked out.
Always do the cheap easy common things first. Problems are rarely the exotic.
Roger Lee
LSRM-A & Rotax Instructor & Rotax IRC
Tucson, AZ Ryan Airfield (KRYN)
520-349-7056 Cell
-
by Ken Ryan » 9 years ago
There seem to be a fair number of problems caused by debris in the carburetor. Question: can these problems be avoided with better filtration?
-
by Garrett Wysocki » 9 years ago
I've had debris in the idle jet from water causing corrosion that breaks loose and/or causes green corrosion that clogs the jet. A filter won't help.
You do not have permissions to reply to this topic.
Related Topics