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Looking for a Lycoming O-360-A3A

djbred18

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Hi, I’m looking for a lycoming O-360-A3A. I have the plane but not the motor! Any leads would be appreciated! Thanks!
 

Ray93J

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The O-360-A4A is the same engine with a solid crank. It is does not have the RPM limited operation area that is required of the A3A due to an AD.
 

djbred18

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The O-360-A4A is the same engine with a solid crank. It is does not have the RPM limited operation area that is required of the A3A due to an AD.
So it’s potentially a better engine? Any leads where I can find one?
 

magman

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You may want to try some insurance companies.

They may be able to refer you to someone that won a salvage bid.
 

Ray93J

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Less restrictions and two less AD’s to deal with, if that is better. Talk with your mechanic about the paperwork to install. Piper changed to this engine sometime in 1966. My 180 has the A4A, shipped from Piper in Nov 1966.
 

flyguydon

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Same as an Archer. Newer version. Better... A4A
 

clinect

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What type of plane do you have? You may be able to use other versions such as A4M.

But that doesn’t change the fact that finding any O360 is not easy as they are in demand for experimentals not to mention Warrior conversions. Beware of salvage yard engines that have had prop strikes. If the “inspection“ is done right you can end up having $30K plus in a $12K engine.

Patience and diligence haunting all the possible internet options will eventually lead to success. Having a usable core is a big part of getting to the finish line as getting an engine outright is pretty hard.
 

AESpecialists

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Be aware that the A4A requires a magneto isolator bearing that Lycoming is inordinately proud of. List price is near $7000 new for just that part alone. The A4M is an otherwise identical engine WITHOUT the isolator. Check the TCDS for eligibility.
Also, per Lycoming, replacing that magneto with an electronic unit does NOT eliminate the 'need' for the isolator bearing.
 

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