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O-360 oil suction screen part number?

jhiggins

Active Member
I need to get a oil suction screen for my o-360. Seems i found part number 61378 that is almost $50, and another part 70484 that is only around $22. Anybody know which is the correct one?
I had removed my Christen inverted system that has a smaller screen with plug.
 
screen

Aircraft Spruce shows Lycoming PN 70434. I believe the horizontal screen parallel valve four cylinder Lycomings all use the same screen. Some older engines used vertical screen which is different pn.
List price 29.75 spruce price 21.48. Prices may not be current. spruce is stocking increasing variety of engine parts.
 
O-360 Oil Screen

The Lycoming parts catalog manual I have is old, last revision was in 1986
(document PC-306-2A). This doc lists PN 70484 Screen, Oil Suction.

The illustrate parts breakdown in the manual shows it mounted horizontal in the sump, on the right aft.
 
screen

70484 is correct, I hit the wrong key. Some of the very old engines used a vertical screen. This is identified by a large hex plug on the bottom of the sump.
 
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