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View Full Version : 912UL low RPM



turboturner
06-19-2010, 10:24 AM
couldn't get the usual 5200RPM today - only 4800, with a little roughness. It was fine on a previous flight half hour earlier, so I ruled out the OAT (30deg C). Both mag sets check OK (150 RPM drop on each @ 3000RPM). Visual inspection revealed nothing unusual. Fresh 92 octane gas. Suggestions/thoughts... anyone?

DesertFox4
06-19-2010, 12:14 PM
What kind of prop?

turboturner
06-20-2010, 08:40 AM
3 bladed, gd adjustable warp drive - thnx.

Av8r3400
06-20-2010, 05:21 PM
Check your carbs, cables and/or air cleaners. Sounds like a classic case of carbs-out-of-sync.

turboturner
06-21-2010, 04:48 AM
Found the problem: rubber flange between right carb & intake manifold was cracked open on both sides.
Thank you.

cap01
06-21-2010, 12:57 PM
get the good carb sockets , www.jbmindustries.com (http://www.jbmindustries.com) .