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View Full Version : Piper 160 Horse w/ Vibration...



Champdriver
07-21-2006, 12:00 PM
Okay Super Cubbers, has anyone ever had a problem with a Lycomnig O-320-E3D Vibrating between 800 RPM and 1100 RPM? Just started flying a PA-28/161 and it has a noticable vibration in this range. There doesn't appear to be any operation limits in the manual, or placards. We are curious if this sounds normal to you guys that run the 150/160 Horse Lycomings. We have made a quick and simple check of the prop Track, and are planning on taking the prop over to the pro shop, and checking Blade angles and profile as well. Will dynamic balance after we check all the physical attributes.
Thanks for any input.
Champdriver

Dano Bardwell
07-21-2006, 12:22 PM
sounds like your on the right track, also check to see if any part of the engine is touching the airframe or engine mount,check carefully to see if anything is loose on your engine.

JimC
07-22-2006, 08:33 PM
Ran into identical symptoms on a PA28-150C some years back. Turned out that the carb was loose on the spider, screwing up the mixture. Tightened the nuts, resafetied, and the problem hasn't recurred in the last 20 someodd years.

Your problem may be different, but this one is easy to check. Just jiggle the carb, and see if it wiggles.

bob turner
07-23-2006, 02:32 AM
Pull the engine off, sell the Cherokee, and get an engineless cub. That should cure all kinds of things.

Champdriver
07-24-2006, 02:14 PM
Thanks for the Assistance, Expecially you Bob. I know the owner would gladly move up to a Super Cub. He has a Beautiful Restored 7ac and now this Cream Puff Warrior, But I also know he longs for a PA-18 with all the goodies... But he is satisfied at this time. Thanks again for the Help, we will be working it hard this week. Thanks again... Champdriver