The engine builder came and took a look today and said there was very minimal scoring and that it was normal and nothing to be concerned about.He was more concerned about the slight darkening spots on the cylinder walls.He said it was from excessive heat and asked if i had run the engine hot at one point.There was one time the motor overheated and i shut it down immediately.It was a bad impeller.He suggested that because we are doing the top end that there may be a loss of compression or maybe some blow by because everything was going to be tight on the top end.He said i should pull the motor and hone it and replace the rings and berings.The motor was running fine and was not burning oil or anything.Is this something to be concerned about or just go ahead and do the top end only??P.S the engine builder knows the owner at the marina.I am just thinking that maybe they are making something out of nothing.When i looked i did not notice any darkening on the cylinder walls.I am going to look again tomorrow.

Are you hearing yourself? As far as I'm conderned this thread is over. Time to get back to selling wood carvings and beads to tourist.

this was not meant for you tutzone.

Just to be on the safe side I would go through the expense doing a complete tear down. Your not looking at that much money. At the very least get a price of new rings and bearings and assembly and let us know how much. It would just suck to have to limp along or perhaps sit on the dock due to a problem that could potentially be solved know. All boils down to how much money you have set aside and the risk your willing to take.
How many hours are on the engine? I don't recall. Anything over 400 I would do it.

I am looking for educated opinions not smart ass responses.Thanks for the replies.

The engine has 250 hours on it.

You'll most certainly hear other opinions however put it back together and run it. Do a compression test if you have any concerns before you accessorize it. You'll be fine... As always to be a 100 % certain you know what you should do however you can always follow the old rule of thumb. If ain't broke don't fix it. Sometimes you can go through all the proper procedures and sit dead in the water also....

Run it. Be sure and post though with your progress.

Sorry about the other business. I should have stayed focussed on your concerns. My bad

Darkening????? Spots ????? it burns fuel in the chamber ,,at 1 point bad fuel will darken the wall !!!

$hit i have seen overheating engines and the blocks still run today !!!


Don't worry about it and get an engine builder that is not a friend of the marina ,,and since when do marinas built engines anyway ??!!!

Put it together and run it !!!!

Don't make a drama out of a persons opinion that wants to rape u !!!!

Just my 2c

Ps ,,this is how a bad scoring and darkening looks like ,,any thing below that ,,u be fine !!!

tutzone,
i admit to being a bit confused at this point. you have this motor and it is partially apart. somebody thinks they see what might be a problem. you don't. no issue there. that happens all the time. what confuses me is that since, in this particular situation, it is an absolute piece of cake to make a small cover to leak that cylinder down at various positions in the rotation... and then do the ones on either side. if the suspect one is the same as the ones on either side , that tells you a lot. if it is decidedly different, then that tells you a lot as well.

i just don't understand why you are so resistant to an simple and objective test that will give you some hard and factual information. while the opinions expressed within this thread may or may not be based on some relevant experience by the writers, the bottom line is that this isn't some bermuda triangle bizzare problem that no one understands. the solution requires a simple judgement based on objective data derived ON SITE... there... with you. not some half baked notions about just winging it back together and hoping for the best. that idea is both stupid and wrong in all respects no matter how much claimed success that writer has had in the past... GEEZE do you really want to take the advice of someone that says he roasts his motors all the time and they still run just fine ?

do the test. it is easy and takes no time at all. look at those numbers and make an informed choice. this notion of diagnosis by distant commitee , none of which have actually seen your hardware , is just asking to be wrong and have your ass handed to you later on.

you are clearly concientious and want to do the right thing.