Compression - NonCC Engine

[TexanC3]

My wife's uncle is looking at getting a replacement engine for his Century Arabian. He found one on evilbay, but the following line has me concerned: "This engine has been compression tested and has seven cylinders that range from 130-135 psi, the eighth cylinder was rated at 115 psi."

Is this this a deal breaker, and what could it mean down the road as far as repair?

Here is the engine in question
http://cgi.ebay.com/ebaymotors/ws/eB...AQ:MOTORS:1123

Thanks for your help!!!

[Rick]

RE: Compression - NonCC Engine

Your cylinders should be within 10%. It could mean a leaky valve or bad rings. The teat for rings is to put about a teaspoon of oil in the cylinder and repeat the test If the compression comes up its rings and means a rebuild for the engine.

[DanielC]

RE: Compression - NonCC Engine

It's a deal breaker. Especially on an engine you cannot physically see and hear run.
My opinion, the price is way out of line, also.

[TexanC3]

RE: Compression - NonCC Engine

Thanks guys! Anyone have a suggestion on where to find a replacement engine or have his rebuilt in Texas?

[JUST-IN-TIME]

RE: Compression - NonCC Engine

compression test on a 4 stroke motor is ok, a leakdown test is the best