Carburetor Piston Wear

by Eriselle in 912 / 914 Technical Questions 10 months ago

Hi there, I am evaluating some wear on my carburetor piston and the housing where the piston appears to be rubbing. Should I be concerned about this? Is this normal?

I don't see any uneven wear on the needle or needle jet.

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LSRM-A
Rotax iRMT Heavy Maintenance
RV-12 SLSA Owner

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Re: Carburetor Piston Wear

by Sean Griffin » 10 months ago

Sean Griffin

51 1.24k 5.38k

Hi Kelsie,

How many hours?

What engine?

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Re: Carburetor Piston Wear

by Eriselle » 10 months ago

Eriselle

5 40 64

Hi Sean, it is a 912 ULS with 602.2 hours. These are the original carburetors.

LSRM-A
Rotax iRMT Heavy Maintenance
RV-12 SLSA Owner

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Re: Carburetor Piston Wear

by Roger Lee » 10 months ago

Roger Lee

131 5.38k 5.46k

This can be caused by vibration from out of sync carbs. It can be caused by carbs because they need to be overhauled if they are getting up in years. It can be caused by other vibrations you can't feel. Things like put of balance props and gearboxes that may need an overhaul.

Roger Lee
LSRM-A & Rotax Instructor & Rotax IRC
Tucson, AZ Ryan Airfield (KRYN)
520-349-7056 Cell

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Re: Carburetor Piston Wear

by Eriselle » 10 months ago

Eriselle

5 40 64

Obviously I will want to investigate and resolve underlying issues, but once that is done, is this wear anything to worry about beyond being an indicator of a problem? Should I be thinking about replacing the piston and/or entire carb (due to the housing wear)?

LSRM-A
Rotax iRMT Heavy Maintenance
RV-12 SLSA Owner

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Re: Carburetor Piston Wear

by Sam Purpura » 10 months ago

Sam Purpura

11 223 1.21k

Vacuum operated piston may be sticking and not working properly. Test it when assembled.

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Carburetor Piston Wear

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