Does anyone know if there's a heavy duty mount w bigger isolators as well for the early dual exhaust birds? They have the isolators more vertical than horizontal. No way I'm givin puny lees duals. Just checking.

Yes, you gotta keep the old 'legs' if it's an early motor and run a 'k' mount. Or the later legs if you have a later engine.
Then you run the later mounts that the engine rests on instead of hanging..

This is what it looks like on an l motor;

BTW, a couple more thoughts;

If you rare doing 520 jugs, you probably already know the ex ports on the 520 are larger than the ports on an O-470. Bolting on a stock exhaust which is almost 3/8" smaller than the ports will leave a 'not so nice' step right down stream of what ever beautiful port work you may have ... Never made much sense to me...

While the LEES exhaust looks killer, I was never successful at getting my hands on one. Don't try getting one during hunting season The late Mark Hawkins did have a nice set of LEES on his bird (I think the first outside of AK) but he was infinitely more patient than I

As an alternative you can have Knisely build you one like the one in the picture. It flows well and has bigger stacks as well as cans. I have the engineering for it, but they were going for an STC when they built that one.

Take care, Rob

Just noticed I messed up last sentence of post. Supposed to be now way I'm giving up my lees. I do have em. Love em!!! Pm'd you rob. Stoked thinking maybe I can use my beefed up K mount. Knisley is great to.

I think you mean the "old legs" that go with an A or J engine. K engine that was first installed in 1956 was the beginning of the bed type or later style mount. I have a Knisley dual setup like in the above picture that they made for me in 1996 and still use the original 1954 A or J engine mount and legs that are bolted to the K engine I have.

180Marty wrote:I think you mean the "old legs" that go with an A or J engine. K engine that was first installed in 1956 was the beginning of the bed type or later style mount. I have a Knisley dual setup like in the above picture that they made for me in 1996 and still use the original 1954 A or J engine mount and legs that are bolted to the K engine I have.

Hey Marty how's it going? How'd you make out this year? I expect a lot better than the guys further east

You are almost correct, it's gonna be the later legs regardless of the engine. I ended that the right way, it just started convoluted ... But what's new

'55, if the tube in those photos of your mount are square to the lower leg, it would work on my exhaust, but they'd get hot .... Can't speak for the LEES, but it would be worth a try for sure.

Marty. Trying to go from the more vertical mounts; where the pucks are; to the more horizontal type. So your engine sits instead hangs more. If that makes since. I think if I understand correct what your sayin rob is that you have to have the k mount AND that style of leg as well. Correct? The older leg will not work w the k mount..

'56 and later legs, but only the 'k' mount because it has the fwd tube and lugs in the correct location.
Wile you're at it use the aluminum seaplane firewall mounts, they won't sag. I know of a guy who produced his own, and they were just a tad longer on the bottom. Came out really nice, no sag and everything lines up nicer at the front of the cowl.

Take care, Rob

Here is a picture a guy did with a Seaplanes West mount I think. It has really big Lord Mount biscuits. It was a 54 or 55 180. If you look in the photos and modifications section of that you will see the red 180. Also Mark Hawkins pic's are still there.

Thanks Marty! That's what I'm talkin bout! I want the big isolators but didn't know you could! Thanks man!

Check out Seaplanes West, they have what you want. I bought the big lord isolatores for the mount i am building for my C175.

Hey Marty,

Are you sure that's a SPW mount? It looks like a TS mount to me, they use 210 biscuits... When I was looking SPW didn't do one for the early birds. Although they had FA'd examples...

Beyond that, the SPW examples I am familiar with, have the extra tube going from the top rear cluster down to the long diagonal.... '55 is familiar with that tube, and there is some concern whether that works with the LEES. And last but not least they weigh and cost a bunch ... But maybe that's not bad in an engine mount

Take care, Rob

Hi Rob, Not sure but think the mount in the picture is SPW---picture was put in 180/185 photo album in March of 2007. Can't remember when TS started making a big mount. Also this mount has the lugs on the bottom that let the mount rotate ahead when the top bolts are loosened from the firewall. The plane is 2393C and belongs to a Jim Hill. Sent you a PM on the farming this year.

If I recall correctly, all the SPW mounts are not made to rotate forward. I went with a Kossla mount with two big and two small biscuts so I would have the tilt forward mount. I had several friends that didn't care and went with SPW mounts in their 185's. My 3 blade big foot C-401 and the heavy duty mount combined to give the 185 near turbine smooth. I called my old mount and 2 blade a shaker.
Ron

I guess nobody but the owner knows exactly what that mount is. It does look like TS but if you look at the whole picture on the 180/185 site it definitely has the tilt ahead feature and also has the vertical tube between the top and bottom of the firewall. If Ron is right about that feature, maybe it is a one of a kind. Here is pic of the TS mount.

That is a tip mount. Spw and ts both get there mounts the same place I do. AWI. Cool guys. I had one made for my last plane and didn't get the bigger isolators. Theyre made of thicker wall tubing. Awesome mount. Trying to see if they can just cut mine off and the boxes for the bigger isolators. It's crazy how smooth it makes it. Been in em.

55wagon wrote:Marty. Trying to go from the more vertical mounts; where the pucks are; to the more horizontal type. So your engine sits instead hangs more. If that makes since. I think if I understand correct what your sayin rob is that you have to have the k mount AND that style of leg as well. Correct? The older leg will not work w the k mount..

I'm reviving an old post....
Here's a pic of SL-1 for the Cessna 180.
It describes installing a later (1956-up) mount on an earlier airplane.
Using an early mount & engine legs on a K or later engine would be the reverse.
A lot of people have done so, including the shop that converted my 53 to a K engine years ago,
but I'd recommend the later mount with it's better rubber isolators.



I'm curious as to certified repair stations that are authorized to repair / overhaul C180 engine mounts.
I know about AWI & Acorn, who else is out there that does this?

The engine mount shown looks like mine, with a 520 on a ‘53. I put a Knisley dual exhaust on, fit with only very minor modification.
I don’t know much I guess, after reading the thread, I’m kind of lost!