Hydrolock - compression question...
 

Ok, I just (finally) heard back from the service center. I took it in
because while a friend of mine was driving, he hit the kill switch at
full throttle. After that, it would even turn over. The reason the
engine wouldn't turn over with because It was in fact hydrolocked. All
6 cyls. had water in them. They did a compression test to see the
extent of the damage and said that one cyl was reading 210 and another
140. Now I understand that this kind of variance is way off, but how
can one cyl be reading 210 on a 10 yr old boat with probably 500 hrs on
it?? The others were in the range of 150-170. Are they pulling my leg
or is a reading of 210 even possible? Any insight would be much
appreciated. I'm thinking I might just go get it and run it a few hours
and recheck the compression.

Hydrolock - compression question...
 

STILL COULD HAVE WATER IN THAT CYLINDER. Clean it out, run the engine for
awhile and then re-do the compression check. Which 6 cyl do you have?


wrote in message
oups.com...
Ok, I just (finally) heard back from the service center. I took it in
because while a friend of mine was driving, he hit the kill switch at
full throttle. After that, it would even turn over. The reason the
engine wouldn't turn over with because It was in fact hydrolocked. All
6 cyls. had water in them. They did a compression test to see the
extent of the damage and said that one cyl was reading 210 and another
140. Now I understand that this kind of variance is way off, but how
can one cyl be reading 210 on a 10 yr old boat with probably 500 hrs on
it?? The others were in the range of 150-170. Are they pulling my leg
or is a reading of 210 even possible? Any insight would be much
appreciated. I'm thinking I might just go get it and run it a few hours
and recheck the compression.

Hydrolock - compression question...
 

It's a volvo 4.3 GS. I'm pretty much thinking along the same lines.
They asked me if I wanted them to do a spring service... oil change,
filter etc. Which leads me to believe the same oil (with water) is
still in there. I told them to wait for me to come in.

Lost In Space/Woodchuck wrote:
STILL COULD HAVE WATER IN THAT CYLINDER. Clean it out, run the engine for
awhile and then re-do the compression check. Which 6 cyl do you have?


wrote in message
oups.com...
Ok, I just (finally) heard back from the service center. I took it in
because while a friend of mine was driving, he hit the kill switch at
full throttle. After that, it would even turn over. The reason the
engine wouldn't turn over with because It was in fact hydrolocked. All
6 cyls. had water in them. They did a compression test to see the
extent of the damage and said that one cyl was reading 210 and another
140. Now I understand that this kind of variance is way off, but how
can one cyl be reading 210 on a 10 yr old boat with probably 500 hrs on
it?? The others were in the range of 150-170. Are they pulling my leg
or is a reading of 210 even possible? Any insight would be much
appreciated. I'm thinking I might just go get it and run it a few hours
and recheck the compression.

Hydrolock - compression question...
 

"Gene Kearns" wrote in message
...
On Wed, 31 May 2006 21:33:47 -0400, "Lost In Space/Woodchuck"
wrote:

STILL COULD HAVE WATER IN THAT CYLINDER. Clean it out, run the engine for
awhile and then re-do the compression check. Which 6 cyl do you have?


It would just about have to.... unless the engine originally had 14:1
compression..... not.

Sounds like an exhayst riser let go.
Jim

Hydrolock - compression question...
 

Gene Kearns wrote:
On Thu, 01 Jun 2006 14:21:03 GMT, "Jim" wrote:


Sounds like an exhayst riser let go.
Jim


Hmmmm... could be, but the OP seems to suggest that the boat was
pooped when the power was abruptly cut.....

That was operator error causing the hydrolock. The problem should have
gone away when the plugs were pulled and the engine spun.
Jim

Hydrolock - compression question...
 

does everyone believe that hitting the kill switch at WOT we can expect to
get water into the engine??

I know you can poop the boat but engine damage is a little more then water
over the stern.

Hydrolock - compression question...
 

Rick wrote:
does everyone believe that hitting the kill switch at WOT we can expect to
get water into the engine??

Oh Yeah!
Jim

Hydrolock - compression question...
 

for that engine, 150-170 would be normal compression.


wrote in message
oups.com...
It's a volvo 4.3 GS. I'm pretty much thinking along the same lines.
They asked me if I wanted them to do a spring service... oil change,
filter etc. Which leads me to believe the same oil (with water) is
still in there. I told them to wait for me to come in.

Lost In Space/Woodchuck wrote:
STILL COULD HAVE WATER IN THAT CYLINDER. Clean it out, run the engine
for
awhile and then re-do the compression check. Which 6 cyl do you have?


wrote in message
oups.com...
Ok, I just (finally) heard back from the service center. I took it in
because while a friend of mine was driving, he hit the kill switch at
full throttle. After that, it would even turn over. The reason the
engine wouldn't turn over with because It was in fact hydrolocked. All
6 cyls. had water in them. They did a compression test to see the
extent of the damage and said that one cyl was reading 210 and another
140. Now I understand that this kind of variance is way off, but how
can one cyl be reading 210 on a 10 yr old boat with probably 500 hrs on
it?? The others were in the range of 150-170. Are they pulling my leg
or is a reading of 210 even possible? Any insight would be much
appreciated. I'm thinking I might just go get it and run it a few hours
and recheck the compression.

Hydrolock - compression question...
 

On Thu, 1 Jun 2006 15:34:18 -0500, "Rick"
wrote:

does everyone believe that hitting the kill switch at WOT we can expect to
get water into the engine??

I know you can poop the boat but engine damage is a little more then water
over the stern.

Depends on the layout of the exhaust system.

Hydrolock - compression question...
 

Rick wrote:
does everyone believe that hitting the kill switch at WOT we can expect to
get water into the engine??

I know you can poop the boat but engine damage is a little more then water
over the stern.

Rick,

If you suddenly shut the engine down at high speed what happens is that
as the engine stops spinning it will actually take a few turns in the
opposite direction, drawing water up into the cylinders. I had the same
thing happen to a friend of mine several years ago, his young daughter
reached over and turned the key to the off position. He called another
friend and he told him what happened. He told him to pull the plugs and
crank the water out. He put the plugs back in and it started right up!
I would have never beleaved it myself, but it worked. I would do the
same thing with the boat in this thread, plus an oil change, he may
have some rings that are frozen, they should loosen up with some light
weight oil in each cylinder overnight.

John