Seized Engine OR Stern Drive diagnosis 454 KC omc

[JayZ]

All,

This Friday/Saturday I am going to start digging into the Classic 22 I just purchased.

As I mentioned, it may have a seized engine. I was reading somewhere that a drive problem can give the appearnce of a seized engine.

Dumb question (not the last one I promise) How does one disconnect the drive (OMC King Cobra) to check to see if the engine will spin freely?

I've ordered the OMC King Cobra manual just haven't recieved it yet.

Thanks!

[dsparis]

Get the manual first.

[XMETAL]

Jay pm me your # I can walk you through it.

[JayZ]

[ QUOTE=$originalposter]{$pagetext}[/QUOTE]

cool. Thanks. It simply can't be that hard and I probably don't have the patience to not tinker with it this weekend. ...should be fun actually.

P.M. forthcoming.

JZ

[dsparis]

Its real easy,especially if you have an engine crane. Pull the fill plug out of the top and thread a lifting ring in. Just be real gentle with #12

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[JayZ]

[ QUOTE=$originalposter]{$pagetext}[/QUOTE]

Roger that, I do have an engine crane...

Thanks!

[silverghost]

JayZ
With such low hours on this drive/engine package there ia a very good chance that the manifolds/risers are rusted-out internally and dripped water/saltwater into the engine through the exhaust ports and rusted some cylinder bores..
I have seen this happen many times before.
The fact that the prior owner actually drove it to the boatyard is not unusual.
I wonder if these exhaust manifolds/risers were the originals ?
Despite the fact that the engine had such low hours this could really be the case.

I have seen more engines siezed by slightly leaky center riser manifolds that were internally leaking over the years.

I would try the Marvel Mystery Oil
with about 25% Automatic Transmission Fluid mixed in.
Remove your spark plugs and fill each cylinder.
Let this mixture soak in the cylinders for a week , or two.
Put the plugs back in hand tight.
Then a week ,or two, with the spark plugs OUT try to quickly jog the engine with the starter or a socket & breaker bar on the front engine balancer center mounting bolt.
With any luck your cylinder bores are not rusted too badly and the engine will turn over.
Good Luck.

[biggiefl]

Yeah that could be a real easy save. Have you checked the oil? If no water you should be golden. I would first pull all the plugs and see if water comes out. If dry then you are even better. If the cyls filled with water and people kept trying to turn it over, you could have damaged internals but then you usually have water in your oil. If you do get it to turn over then I would next pull the manifolds and see what cyls were leaking. You can look inside to see if it is bad. You can remove the valve covers to see if you have any stuck valves. You do NOT want to run this engine until you see what is going on. A "quick" start might take out a piston or more. If the valves look to be doing OK while you/somebody SLOWLY turns over the engine then you can probably buy a new set of manifolds & risers(which you will need with a new engine anyway) and see how it goes. I have seen MANY engines saved, really depends on how much water and how long it sat.

[joseph m. hahnl]

pull the leg, pull the spark plugs, squirt some 2 stoke oil down each plug hole, put a wrench on the harmonic balancer. give it a pull or push. If it doesn't turn freely .Pull the motor . Do not use the starter to turn it over,You could score the cylinder.Not to mention a played starter can give the appearance that the motor is seized. chances are pretty good that worst case , you'll only need to re-Ring and main / rod bearings with a light cylinder hone. Ask me how I know

[JayZ]

Plugs are out. Oil mixture going in. I'm going to see if I can spin the motor by hand ...I haven't tried only been told it was seized by P.O. so what do I have to lose?

At any rate, we'll see and I'll update all tomorrow.
Thanks for all your help.

[silverghost]

You should give the oil in the cylinders a week or so to free up stuck pstons & rings~~~IF it is going to work.

[JayZ]

[ QUOTE=$originalposter]{$pagetext}[/QUOTE]

I hear you Silverghost. I just wanted to verify that the thing was seized in the first place. I purchased it assuming it was but haven't really had my own hands on it.

When it comes time to try to spin it over I assume that I'll spin it clockwise when looking at the harmonic balancer, yes?

...Do I simply attach a 3/4 socket with a breaker bar or is there something else I should do?

[mattyboy]

If i read your first thread right the boat went in for service under it's own power than 3 weeks later it's seized. i 'd pull the plugs and try to turn it with the starter. I am thinking hydrolock , did the service mech look at it again?

[JayZ]

[ QUOTE=$originalposter]{$pagetext}[/QUOTE]


Mattyboy, ...was kind of thinking the same thing. I have an old car that has two 3 barrell downdraft webers and I have gotten water down in them once or twice and pulled plugs and cleared it out no problem.

At any rate, plugs are pulled battery charger is on so maybe I will get lucky.

All the plugs looked pretty good except one had some funk on it.

As for hand turning it I am still curious if it is simply the 3/4 bolt on the harmonic balancer that I will use to spin the motor. anyone?

[JayZ]

[ QUOTE=$originalposter]{$pagetext}[/QUOTE]

...Let me rephrase. I am hoping it was only hydro lock. Stay tuned.
JZ