Noise coming out of the gear

by Nir Meirav in 912 / 914 Technical Questions 11 years ago

Hi guys,

I have 912UL with ~800 hours on it.installed as pusher.
There is a great noise coming out of the gear. The engine is working smooth and no special "tics" sound when increasing or reducing the RPM.
There is a permanent fix "teeth wheel" noise coming out of the gear that seems to be greater then it should.

The engine never had a prop strike or any other damage.

Any ideas? :dry:
Charlie

Re: Noise coming out of the gear

by Rob Seaton » 11 years ago

Rob Seaton

3 1.32k 240

You may have pitted/spalled gearset. The best way to confirm this is to performing a dynamic prop balance; if the balancer keeps telling you to move the weights around you have a bad gearset. If you do then check the fuel pump (remove, empty of fuel and shake it: if you hear a rattle the vibrations have broken it). This vibration may also damage the carbs, exhaust and even the rudder pins. Watch the carb sync video!

To avoid pitted gears: sync the carbs, avoid low idle, balance the prop, use good oil and change it frequently. Also always keep in mind this is NOT a motorcycle or snowmobile, it is a piston powered, geared engine with a huge inertia on the end (prop); Avoid rapid throttle movements! Get it running smoothly! Keep it running smoothly! Ask any Continental GTSIO-520 operator, they are an awesome engine, if the guy with the throttle in his hand knows what he is doing.
Rob

Report

You do not have permissions to reply to this topic.

Title	Category	Replies
914UL Ignition Noise	912 / 914 Technical Questions	2
915 Gearbox Assembly	915iS Technical Questions	8
Gearbox question	General Tech Discussion	1
912ULS Noise Turning Prop	912 / 914 Technical Questions	15
Oil purge after gearbox install?	912 / 914 Technical Questions	4

Noise coming out of the gear

Recent Videos

Safety First!

ROTALK News

Prize Giveaway!

Log In/Out

Login