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327QA compression readings and analysis

August 16 2012 at 5:01 PM		Philip Croff  (no login)
[linked image]

The diagram above is reversed...the engine marked 1 is port, 2 is a starboard.

The two cylinders for reasons unknown had water shoot out when i removed the plugs and turned it oVer via the starter. I swore i removed the plugs and cranked it over when i took delivery of the vessel. There's an issue somewhere which wi will later chase after. Keep in mind that #2 had water in its crankcase. i have not opened it yet but I still feel it's probably a cracked intake manifold. No water in number 1. ive had both engines fire but have not actually ran them.

What do you guys make of the varying compression? Could this be one of those times when the rings are just stuck and compression will shoot back up when i run it, or are the chances of that happening more like the chances of belt dressing actually doing any good? Keep in mind the engines were cold and i've read that compression readings when cold arent of much use.

Are these things bad enough that i be pulling them now for at least a honing and rings or will they last a season with a few hours of uptime?

Ive read that anything more than a 10% variance is bad. i guess my readings show i dont have pistons with holes in them at least, and that my crankcase water isnt from a combustion chamber issue

 
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