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Talk about owner produced parts brings to mind a Comanche that we installed our overhauled engine on and for weeks I could not figure out what was "funny" about it. Finally realized that it had side windows made out of flat plexiglass. I don't remember if I test flew ir but it had to be noisy!

Continental crankshafts are surface hardened in the flange area. In my 44 years in the engine business seeing well over a thousand prop strike inspections I've seen Continental crankshafts that took a very light strike ie chopping up a lightweight towbar crack. OTOH I've seen things like a...

Yankee Aviation Plymouth Mass.

WE did the Frank 220 conversion plus a baggage compartment tank. Due to the learning curve it took over 100 hours to do. I test flew it with myself and 15 gallons of gas. As stated it was beast. in a 20kt wind using 20 degrees of flap it got off in about 150'. Cruised at around 145 mph IAS down...

Check the muffler because it is easy to do. It takes a lot of cam wear to cause that amount of power loss. I'd take the rocker covers off and do a comparative check of rocker arm travel. There are numbers out there saying what the lift should be. I have never seen a cam failure that took out...

No! Unless the aircraft is on a part 135 air taxi certificate it's just a useless piece of paper.

I once got an H2AD that had 3976 hours and never had a cylinder off. Turned out it was from a fish spotter and it flew 8 hours or more every day!. OTOH since RV's are so plentiful why buy one with that engine. I for one do not like the siamese mag.

The potential gotcha here is the crankshaft AD looking for corrosion in the front bore. Charlie Melot

If you can buy it knowing where $10K is coming from if the cam goes buy it. If the rest of the cam is no worse than shone here put in new lifters and hope for the best. Charlie Melot

For reason or reasons forgotten the "D2" has a tendency to use serious quantities of oil. They don't all do it but IIRC too many did.

I would certainly worry about this. The "D" is an OK engine. The "D2" is NOT. With the plethora of 120/140's for sale to choose from I would certainly favor one with the O-200 crank etc STC done on a good C-85.

gear tooth?? Need better picture and multiple angles

I agree. A failure waiting to happen. Hard to believe anyone could be stupid enough to use something like that let alone show it off! WHY?

What is the black goop on the parting surfaces.

I've flown a hundred or so 182's maybe 500 hours over the last 53 years. They run poorly with the throttle back and carburetor heat on. They do like to make ice! One that I flew a lot had an ice detector light that was supposed to indicate the presence of ice. The light was on more than it was...

Thanks for the kudos guys! Sold the shop to an employee in '16. I still hear good things. I read this, the red board and BT almost every day to try to help keep folks out of trouble when I can. The bottom line is still the same. Most of the time you get what you pay for, seldom more, and all...

A PA-28-235 may well have a narrow deck engine. This limits the availability of good first run overhauled exchange cylinders. If a cylinder needs to have cracks welded and the barrel plated the cost to overhaul installing new valve seats, valve guides, piston, rings, pin plugs, and rocker...

I have only encountered maybe 4 engines that had oversize crankshaft seals in my career. It is the boss in the crankcase that is bored to P.050 requiring an oversize seal. I saw one instance of a leaky seal that finally got resolved with the fifth seal. It lasted a long time. There are a bunch...

Look on the top of the backbone for stamping WDC and 4 numbers. If that is there the case was lap and align bored and probably had cracks repaired. If that is the case there is a somewhat greater chance that it will reject. Most cases will survive two overhauls and I've seen some with three sets...

Pull all the lifters and inspect have someone who knows what they are looking at inspect the cam lobes. Tappets usually fail first so there is a possibility the lobes are good and new tappets could save it?FWIW crankcases are machined as a matched set during manufacture. Swapping 1/2 a case is...