Ford 302 spark plugs

[Scott06]

Damm engine only has about 20 hours on it

See if there is water in the cylinders possible it hydrolocked

 

[Jakem]

If there was water in there wouldn't it be noticeable out the exhaust. If that's the issue is it repairable?

 

[achris]

If there was water in there wouldn't it be noticeable out the exhaust.

Not necessarily.

If that's the issue is it repairable?

Depends on what's failed.

On this rebuild, did you replace manifolds and elbows, and use new Merc elbow gaskets?

Chris...

 

[Jakem]

I used new gaskets yes...the manifolds and elbows seemed in good shape..no corrosion or anything. I never lost any coolant anywere. It was never down anyways

 

[Lou C]

Remove spark plugs & valve covers & see if will crank over with the ignition disabled. Look for normal valve train movement & see if water comes out of the spark plug holes. That will also reveal if something failed in the valve train.

 

[Jakem]

Right o...I'll do some digging today...the engine is under warranty..18 month unlimited hours...my.gut says there going to try and get out of it...

 

[Lou C]

If it’s under warrantee might be better not to touch anything other than making sure there is oil in the crankcase and no water in the cyls

 

[Jakem]

Oil is full and still clean...I'll pull plugs and see if I can tell anything

 

[Jakem]

Here's a pic of spark plugs that had 1 run on them for about half hour in the river yesterday...varied speed and rpm.

 

[Jakem]

Here's a pic of spark plugs that had 1 run on them for about half hour in the river yesterday...varied speed and rpm.

 

[Lou C]

looks to be running quite lean, you would like to see a tan/light brown color on the center insulator. At least it doesn't seem to be burning oil!

 

[Jakem]

Cant imagine being leen for short period of time would lock it up though..I spun it back and.forth about 10 times with crank bolt and no water in any that I can see

 

[Scott06]

Cant imagine being leen for short period of time would lock it up though..I spun it back and.forth about 10 times with crank bolt and no water in any that I can see

So its no longer locked up now? be careful not to snap the bolt of the crank ...

If there was water in there wouldn't it be noticeable out the exhaust. If that's the issue is it repairable?

There is always water in the exhaust in a marine application. If you get enough water into a cylinder since water doesn't compress it can lock an engine up even bending rods. I think it is more typically seen after shutoff water leaking in exhaust manifolds/elbows or cracked heads leak into cylinder, on next start piston comes up, engine gets locked as water wont compress... Easy thing to rule out if it is locked up.

 

[jhande]

I'd put it back together and get warranty support.

 

[Jakem]

Ya it's locked up...not fully like I can go all the way clockwise till it hits something...the counter clockwise till it hits again...

 

[Jakem]

Ya it's locked up...not fully like I can go all the way clockwise till it hits something...the counter clockwise till it hits again...

Sorry what I meant about wayer in the exhaust I meant white smoke like a head gasket issue

 

[Scott06]

Sorry what I meant about wayer in the exhaust I meant white smoke like a head gasket issue

you wont notice the water that's not supposed to be in the exhaust from the water that is supposed to be in the exhaust (cooling water exit to overboard goes in exhaust )

 

[Jakem]

Gotcha...

 

[Scott06]

Ya it's locked up...not fully like I can go all the way clockwise till it hits something...the counter clockwise till it hits again...

Looks like you got a bum rebuild...

 

[nola mike]

Looks like you got a bum rebuild...

Even under warranty, my curiousity would have me pulling the valve covers...