C-90 crankshaft availability?

[Robert Lees]

A friend here in the UK is looking to buy a C-90, and reportedly the crank is scrap from being corroded. I have not seen it, and we have to assume worst case that it cannot be ground to remove corrosion.

Where might be a good place to start to look for serviceable C-90 cranks in the USA?

Thanks,
Rob

[PA1195]

Re: C-90 crankshaft availability?

The C-90 and 0-200 might share the same crankshaft...not sure about parts interchange however. If so sourcing an 0-200 crank might be easier than one for a C-90 that's rare and well used.

Gary

[LostnSpace]

Re: C-90 crankshaft availability?

[QUOTE=Robert Lees;90884]A friend here in the UK is looking to buy a C-90, and reportedly the crank is scrap from being corroded. I have not seen it, and we have to assume worst case that it cannot be ground to remove corrosion.

Where might be a good place to start to look for serviceable C-90 cranks in the USA?

Hi Rob, When I bought a C-90 I was told it had 450 hours since major overhaul, I decided to open it and inspected, sent the crank off and got it back red tagged, looked for several months and couldn't find one, finally went with G&N, Inc. Owensboro, KY. the case had to be cut for a slinger ring, wish you guys the best, gary

[Robert Lees]

Re: C-90 crankshaft availability?

Hi Rob, When I bought a C-90 I was told it had 450 hours since major overhaul, I decided to open it and inspected, sent the crank off and got it back red tagged, looked for several months and couldn't find one, finally went with G&N, Inc. Owensboro, KY. the case had to be cut for a slinger ring, wish you guys the best, gary

Gary, is that like the 0-200 crank in the C85 case?

[Guest]

Re: C-90 crankshaft availability?

I had a somewhat similar experience and also bought a new crank from G & N but my case already fit it.

There used to be two companies called G & N.

I bought from Edgecomb G & N , Owensboro, KY.

It was just a crank replcement, no mod or upgrade.

Dave

[PA1195]

Re: C-90 crankshaft availability?

Gary, is that like the 0-200 crank in the C85 case?

Not quite Robert as the C-90/0-200 cases may already be similar, or there may have been hardware upgrades and machining changes for the newer 0-200 over time. I'd confirm interchangeability but Continental lists crankshaft 530182 as fitting the C-90/0200, engine codes C/D. The main and rod bearings also cross reference.

Edit: The crank P/N 653012 is what I installed in my C-85 so that number must have superseded the 530182 shown in the older link I provided. There are surely re-certified cranks out there.

To convert a C-85 to 0-200 crankshaft takes machining the oil slinger groove on the C-85 case...I assume it's already the correct size on the C-90 but you might check with Divco or Tim may already know.

Gary

[Guest]

Re: C-90 crankshaft availability?

I got a part number 653012 for about $1300 in 1999/2000 and used it last month. Long delay time.

Here is a link to a another shop => http://www.aircraft-specialties.com/...kshaft-653012/

Eek!, I see that this outfit also has a $1000 core charge making it a $4770 purchase if you have no old crank. I did not have an old crank to trade in when I purchased mine as I had scraped it already.

[Guest]

Re: C-90 crankshaft availability?

Edgecomb G&N has one.

Go to => http://www.edgcumbegn.com/ContinentalProducts.php

search for 653012

[3Dreaming]

Re: C-90 crankshaft availability?

Rob, the cranks are basically the same from bearing journal and throw standpoint, but the 0-200 crank has a oil slinger ring at the front that the C-90 does not have. However the C-90 case can be modified to accept the 0-200 crank. We had to do this with the C-90 in the clipwing I restored.

[Robert Lees]

Re: C-90 crankshaft availability?

...

To convert a C-85 to 0-200 crankshaft takes machining the oil slinger groove on the C-85 case...Gary

I'm aware of that (my own C85 was converted thus), but I am unaware and ignorant of the C90 in general. Thanks for your (and everyone's) input so far.

Rob

[Robert Lees]

Re: C-90 crankshaft availability?

Rob, the cranks are basically the same from bearing journal and throw standpoint, but the 0-200 crank has a oil slinger ring at the front that the C-90 does not have. However the C-90 case can be modified to accept the 0-200 crank. We had to do this with the C-90 in the clipwing I restored.

Thanks Tom: knowing the C90 case can take an O-200 crank helps (is that the same mod to the 85 case with the oil slinger?) And how does that affect the good torque that the C90 offers over the O-200?

Rob

[PA1195]

Re: C-90 crankshaft availability?

I'd determine what cases and C-90 crank he has. They may be an early version, or may have been converted to newer components at some point. I suspect from reading here and elsewhere that either both the C-90 case and crank evolved, or Continental's replacement parts for the C-90 have evolved and now share common parts with the 0-200. The latter makes sense.

I looked at this issue in 2003 when I had my PA-11's C-90-8 overhauled. One option was to do some case work (did that for later if needed) and replace the C-90 crank or grind it 0.020 under per STC (did that due to overall cost).

Gary

[Ragwing nut]

Re: C-90 crankshaft availability?

The 90 and o-200 share the same crankshaft. The difference in power comes from the camshaft and rpm limits.

[Robert Lees]

Re: C-90 crankshaft availability?

Thanks all!
Rob

[Edwin Otha]

Re: C-90 crankshaft availability?

I have some red tagged cranks should you need one. They are O200 cranks.
EO