Conical Lycoming Rubbers

[Steve Pierce]

Yes, I keep a set on hand and just used them 2 days ago. They are called out on the engine installation drawing.

[Jim Hann]

Yes, I keep a set on hand and just used them 2 days ago. They are called out on the engine installation drawing.

Ugh, I FINALLY found the drawing, 14474, “Power Plant” correct old style English is killing me!

Thank you, again.

[Jim Hann]

I use the 1.84" measurement. I made a tool out of a piece of aluminum to make the measurement over the baffle. I check with all the weight of the engine on the mount. I also put DC4 on the id of the bushings.

Grabbing the DC-4 and wish us luck tomorrow!


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[Jim Hann]

Steve, going slightly off topic. I have an Experimental with an HO-360-B1B, it is a conical mount. Are the mounting details (washers, bushings, etc) the same? I haven't been able to find a definitive answer on the web but there are allusions to the fact that all -235, -290, -320, and -360 conical setups are the same.

Thanks!

[Steve Pierce]

The engine parts manual should show the bushings. As far as I know the washers and bushings are the same.

[Jim Hann]

The engine parts manual should show the bushings. As far as I know the washers and bushings are the same.

That's what I thought, and I didn't find it. After seeing your post I pulled up the my -320 parts manual and found it easily, went back to the -360 manual and they just aren't listed there or any place that I can find. Thanks for the reply!

Jim

[59pacer]

I installed new Lycoming #71032 mounts at engine overhaul. After 100 hours in 15 months, the engine is sagging badly. My record with the Aircraft Spruce (non-approved) home builders type has been no better.
I see that Superior have an SL 71032.
Has anyone had any experience of these?
They have all been set up to the 40"/lbs or 1.84" spec.
It's got so 'normal', that as the minimum idle on the engine reaches 800 rpm, I know to check for engine sag!

[Steve Pierce]

I have always used the Lycoming rubbers and get many years out of them.