Prop strike engines

[jibby212]

I have been searching for an o360 for my rv7 and have found many which have had a prop strike. There is a o360 a1a WITH 346 SMOH for 12950 on Barnstormers but it has had a prop strike, flange dials good but I have a feeling that don't mean a lot. I'm thinking I should stay away from these engines but any professional opinions would be appreciated.

[Mel]

Originally Posted by jibby212

I have been searching for an o360 for my rv7 and have found many which have had a prop strike. There is a o360 a1a WITH 346 SMOH for 1295 on Barnstormers but it has had a prop strike, flange dials good but I have a feeling that don't mean a lot. I'm thinking I should stay away from these engines but any professional opinions would be appreciated.

Lycoming says ANY prop strike, no matter how minor, requires a tear down and complete inspection. One of the most common fail points is the crankshaft/camshaft gear bolt.

[Raymo]

I assume you left off a zero on that number (1295). The engine might be worth half that with the prop strike, IMO.

I am in the process of a prop strike inspection (slow boat) on an O-235. I tried selling it as is with the strike noted in the log book and amazingly had a few people ask to buy the engine but without the log book entry. I declined.

See SB 533B for everything required. The dial-indicator check for a bend flange, as Mel said, is still required but only part of the overall inspection. Lots of parts have to sent off for NDI.

[LittleDave]

I bought one this summer that was a prop strike 13xx since major. I thought it worth the risk. It said the crank dialed .0015". I found it to be accurate after it got here. I planned to rebuild the engine anyway so the only risk for me was the crank itself, I thought. So after tearing it down, I sent off everything in the cases for inspection/repair. It all came back after necessary work with papers for just over $3k. I'm happy.

Ditto what Mel said. One area on the crank that takes abuse, I found out, is where the cam drive gear mounts to the front of the crank. Some cranks can be repaired there. This one didn't need it.

[tspear]

Originally Posted by Raymo

I am in the process of a prop strike inspection (slow boat) on an O-235. I tried selling it as is with the strike noted in the log book and amazingly had a few people ask to buy the engine but without the log book entry. I declined.

Why? (Both why not sell, and why would they want it without the log book)

Tim

[mfleming]

I had a sudden stoppage back in the day with an 0-470-K.

Back then the sentiment was check the crank flange and if good...carry on.

My flange checked out good. Against the advice of all my aviation friends, I tore down the engine anyway. I can't say the damage was directly related to the sudden stoppage but I found a cracked crankshaft and two cracked rods.

It can get expensive

[JonJay]

Originally Posted by tspear

Why? (Both why not sell, and why would they want it without the log book)

Tim

You must be honest, as is Raymo.

[tspear]

Originally Posted by JonJay

You must be honest, as is Raymo.

I get the honest, but I am just not understanding the motive, more on the buyer side than the seller side.

Tim

[Kyle Boatright]

Originally Posted by tspear

Why? (Both why not sell, and why would they want it without the log book)

Tim

They want it without the entry mentioning the prop strike. Then they can list it for sale without a prop strike, because there is no record of a strike in the logs. A fraudulent practice that could get someone killed.

[tspear]

Originally Posted by Kyle Boatright

They want it without the entry mentioning the prop strike. Then they can list it for sale without a prop strike, because there is no record of a strike in the logs. A fraudulent practice that could get someone killed.

Oh ****. I did not think of that. It never even occurred to me.

Tim