Autopsy Report on Cruis'n Rulz!
 

As The Wrench Turns...
Got the heads off; and posted some pics on the metalworking Dropbox
at:
http://www.metalworking.com/dropbox/
See valve.jpg 3 pics
No damage to the cylinder wall or head, and just a couple minor dings
on the piston crown. Lucky me.
JR
HOME PAGE:
http://www.seanet.com/~jasonrnorth
--------------------------------------------------

Autopsy Report on Cruis'n Rulz!
 

JR North wrote:
As The Wrench Turns...
Got the heads off; and posted some pics on the metalworking Dropbox
at:
http://www.metalworking.com/dropbox/
See valve.jpg 3 pics
No damage to the cylinder wall or head, and just a couple minor dings
on the piston crown. Lucky me.
JR
HOME PAGE:
http://www.seanet.com/~jasonrnorth
--------------------------------------------------

Definitely looks broken! Hope it goes back together without any more
problems.

Autopsy Report on Cruis'n Rulz!
 

On Jul 25, 1:47*am, JR North wrote:
As The Wrench Turns...
Got the heads off; and posted some pics on the metalworking Dropbox
at:http://www.metalworking.com/dropbox/
See valve.jpg *3 pics
No damage to the cylinder wall or head, and just a couple minor dings
on the piston crown. Lucky me.
JR
HOME PAGE:http://www.seanet.com/~jasonrnorth
--------------------------------------------------

I was surprised how corroded the combustion chamber was!

Autopsy Report on Cruis'n Rulz!
 

"JR North" wrote in message
...
As The Wrench Turns...
Got the heads off; and posted some pics on the metalworking Dropbox
at:
http://www.metalworking.com/dropbox/
See valve.jpg 3 pics
No damage to the cylinder wall or head, and just a couple minor dings
on the piston crown. Lucky me.
JR
HOME PAGE:
http://www.seanet.com/~jasonrnorth
--------------------------------------------------

That's a lot of rust on that head. Other one look like that?

Autopsy Report on Cruis'n Rulz!
 

JR North wrote:
As The Wrench Turns...
Got the heads off; and posted some pics on the metalworking Dropbox
at:
http://www.metalworking.com/dropbox/
See valve.jpg 3 pics
No damage to the cylinder wall or head, and just a couple minor dings
on the piston crown. Lucky me.
JR
HOME PAGE:
http://www.seanet.com/~jasonrnorth
--------------------------------------------------

It does look like someone forgot to fog the engine. ;)

Autopsy Report on Cruis'n Rulz!
 

wrote in message
...
On Jul 25, 8:03 am, "jamesgangnc" wrote:
"JR North" wrote in message

...

As The Wrench Turns...
Got the heads off; and posted some pics on the metalworking Dropbox
at:
http://www.metalworking.com/dropbox/
See valve.jpg 3 pics
No damage to the cylinder wall or head, and just a couple minor dings
on the piston crown. Lucky me.
JR
HOME PAGE:
http://www.seanet.com/~jasonrnorth
--------------------------------------------------

That's a lot of rust on that head. Other one look like that?

That's what I thought......certainly makes think about whether this is
common with I/O's. Never owned one, so I don't know. I believe he said
he fogged it, didn't he?

Not the ones I see. But then I'm in "trailer boating in lakes" land here in
Raleigh. Might be sitting in a slip in salt water does it. There is going
to be one or two cylinders sitting with the exhaust valve open when the
engine is shut off just about everytime. If the boat sits in water then the
humidity is going to remain high through the exhaust system so it will get
high in the cylinder as well. It's not specific to an i/o though, any boat
with an inboard marinized auto engine is going to be in the same situation.
I would have expected the small amount of oil that gets past the valve stems
to keep the valves from sticking though.

The main issue specific to i/os in a slip is that the outdrive sits in the
water. Most outboards can be raised enough to get the entire engine out of
the water.

Regular use would probably reduce the problem. And that might explain why
commercial fishing boats run marinized auto engines for a long time without
problems.

Autopsy Report on Cruis'n Rulz!
 

On Jul 25, 9:14*am, "jamesgangnc" wrote:
wrote in message

...
On Jul 25, 8:03 am, "jamesgangnc" wrote:





"JR North" wrote in message

.. .

As The Wrench Turns...
Got the heads off; and posted some pics on the metalworking Dropbox
at:
http://www.metalworking.com/dropbox/
See valve.jpg 3 pics
No damage to the cylinder wall or head, and just a couple minor dings
on the piston crown. Lucky me.
JR
HOME PAGE:
http://www.seanet.com/~jasonrnorth
--------------------------------------------------

That's a lot of rust on that head. Other one look like that?

That's what I thought......certainly makes think about whether this is
common with I/O's. Never owned one, so I don't know. I believe he said
he fogged it, didn't he?

Not the ones I see. *But then I'm in "trailer boating in lakes" land here in
Raleigh. *Might be sitting in a slip in salt water does it. *There is going
to be one or two cylinders sitting with the exhaust valve open when the
engine is shut off just about everytime. *If the boat sits in water then the
humidity is going to remain high through the exhaust system so it will get
high in the cylinder as well. *It's not specific to an i/o though, any boat
with an inboard marinized auto engine is going to be in the same situation.

Autopsy Report on Cruis'n Rulz!
 

"jamesgangnc" wrote in message
m...
wrote in message
...
On Jul 25, 8:03 am, "jamesgangnc" wrote:
"JR North" wrote in message

...

As The Wrench Turns...
Got the heads off; and posted some pics on the metalworking Dropbox
at:
http://www.metalworking.com/dropbox/
See valve.jpg 3 pics
No damage to the cylinder wall or head, and just a couple minor dings
on the piston crown. Lucky me.
JR
HOME PAGE:
http://www.seanet.com/~jasonrnorth
--------------------------------------------------

That's a lot of rust on that head. Other one look like that?

That's what I thought......certainly makes think about whether this is
common with I/O's. Never owned one, so I don't know. I believe he said
he fogged it, didn't he?

Not the ones I see. But then I'm in "trailer boating in lakes" land here
in Raleigh. Might be sitting in a slip in salt water does it. There is
going to be one or two cylinders sitting with the exhaust valve open when
the engine is shut off just about everytime. If the boat sits in water
then the humidity is going to remain high through the exhaust system so it
will get high in the cylinder as well. It's not specific to an i/o
though, any boat with an inboard marinized auto engine is going to be in
the same situation. I would have expected the small amount of oil that
gets past the valve stems to keep the valves from sticking though.

The main issue specific to i/os in a slip is that the outdrive sits in the
water. Most outboards can be raised enough to get the entire engine out
of the water.

Regular use would probably reduce the problem. And that might explain why
commercial fishing boats run marinized auto engines for a long time
without problems.

The number one reason this happens is that folks try to extend the life of
their exhaust systems beyond recommended limits.

Autopsy Report on Cruis'n Rulz!
 

The result of the failed right bank manifold, allowing sea water to run
in the exhaust port into the cylinder. That's what seized the valve
also. Only 2 cylinders show rust on the right bank, none on the left.
JR


jamesgangnc wrote:
"JR North" wrote in message
...

As The Wrench Turns...
Got the heads off; and posted some pics on the metalworking Dropbox
at:
http://www.metalworking.com/dropbox/
See valve.jpg 3 pics
No damage to the cylinder wall or head, and just a couple minor dings
on the piston crown. Lucky me.
JR
HOME PAGE:
http://www.seanet.com/~jasonrnorth
--------------------------------------------------


That's a lot of rust on that head. Other one look like that?



--
--------------------------------------------------------------
Home Page: http://www.seanet.com/~jasonrnorth

Autopsy Report on Cruis'n Rulz!
 

On Jul 25, 11:21*am, JR North wrote:
The result of the failed right bank manifold, allowing sea water to run
in the exhaust port into the cylinder. That's what seized the valve
also. Only 2 cylinders show rust on the right bank, none on the left.
JR



That makes sense. So what's the plan?