More on Lycoming Engine Mount Bushings.

[wyandot jim]

OK Guys.
I need a little help here with bushings and what to use for a O-290-D2B and
O-320/O320-A1A The info I have states to use Lycoming P/N 60833 for the 290s and possibly the early O320/A1A. I have already installed P/N 71032 in the Pacer's 1955 O-320 which may not be the correct P/N per Lycoming data. P/N 71032 starts with model O-320-A2A.
All the info I have found states to use P/N 60833 for the O-290s. That is what ACS list also
Below pictures have a 60833 on the left, middle P/N 71032, right is also for an
O-320. I have already bought 60833 and have not taken out the old ones. So don't know what is in place. The different P/Ns also have different Dia. for the Engine case.
This should not be this hard or maybe I'm making it to hard.
Thanks,
Jim

[JPerkins]

Jim, do you have the drawings cd? When I did mine a couple months back I looked on there to verify the correct part #.

[Glen Geller]

Our six PA22's from 1955 (O-320 no dash) to 1960 (O-320-something wide deck) all use the one in the center.
From Aircraft Spruce online:
60883: Lycoming O235 C1B & O290D, 7/8" dia mounting hole
71032: Lycoming O235, O320, O360 models, 1" dia mounting hole We order these and the center bushing in you photos arrives.

The outer ones in your photo look to me like a larger bolt hole, is that correct?

GG

[wyandot jim]

[QUOTE=Glen Geller;101220]Our six PA22's from 1955 (O-320 no dash) to 1960 (O-320-something wide deck) all use the one in the center.
From Aircraft Spruce online:
60883: Lycoming O235 C1B & O290D, 7/8" dia mounting hole
71032: Lycoming O235, O320, O360 models, 1" dia mounting hole We order these and the center bushing in you photos arrives.

Glen,
Thank you so much. The bolt holes are the same size , just the way the picture was taken.
I wanted to confirm that the P/N 60883 was the correct one for the 290s. Also since I can't find where the P/N 71032 is the correct one for the (O-320 no dash) is the correct one. I assume since it is listed for the O-320-A2A it would also be correct for the O-320 no dash.
Thanks so much,
Jim

Jason,
Thank you also. I do not have the CD for the 7GC Champion with the 290. But yes I have the one for the Pacer.
Just trying to pick the brains of you guys that have the 290s in your planes.

[cozzmo81]

Jim,
The Illustrated parts catalog I have for the O-290 D series says that the 71032 Is the correct part number. These are what I had ordered for replacement before I decided to swap In The O320-A2A which also uses the 71032 bushings.

[Pacerfgoe]

As I understand it, the size of the bolts are all the same, it's the size of the hole bored into the mounting flange that differs. The 290 has a 7/8" bore, for the 60883 bushing, and the 320 has a 1" bore for the 71032 bushing. I went and measured my very early 320- no dash (sn# 478 ) and it has a 1" bore for the 71032 bushing which matches what my parts manual says.

That's my .02

[wyandot jim]

Jim,
The Illustrated parts catalog I have for the O-290 D series says that the 71032 Is the correct part number. These are what I had ordered for replacement before I decided to swap In The O320-A2A which also uses the 71032 bushings.

This is what is confusing me. Everything I have read and as Pacerfjoe stated the P/N 60883 are the ones for the O-290Ds.
Pacerfjoe glad your parts manual indicates that the 71032 is the correct one for the O-320(no dash) because that is what I used for our O-320(no dash)

Now that I'm at Son's house we will find out tomorrow while at the airport if we have the correct ones/60883 for the O-290-D2B.

Thanks Guys
Jim

[Steve Pierce]

According to the most recent O-290 parts catalog it takes the same 71032 bushings as the O-320.
https://www.lycoming.com/CONTENT/PARTS-CATALOG-O-290-D

[Frogdad]

I use the 71032 bushings in my O-290D2. we just turn down the shoulder to 7/8" dia.
I like that little extra support area the shoulder gives vs. the taper only bushings.

[Pacerfgoe]

According to the most recent O-290 parts catalog it takes the same 71032 bushings as the O-320.
https://www.lycoming.com/CONTENT/PARTS-CATALOG-O-290-D

That's interesting, because I used these on my 290 and they didn't fit very well....They definitely didn't fit into the 7/8" bore, so I had to do the same as FROGDAD did and cut down the centre part so it was shaped more like the 60883 bushing.....