Attention Gear Heads. Hydrolock

[Big Block Power]

I am not sure, I know in our case though when we enter the no wake zone it is quite a distance from there to our boat slip and we just idle to get to the other side of our dock and are going extremely slow and not bumping The throttle we are going well below no wake speed I am just not sure how replacing the spark plugs and the starter is going to fix the hydrolock problem from happening again. Does anyone else think it would be a good idea to require them to do a compression test on each cylinder?

Yea that's not a good sign forsure then. Did you back off of it pretty hard before the no wake zone? That could have caused the reversion. Not sure your going to lose compression unless there's more damage. I can't believe these are not bending rods or anything else. We have totaled out cars for a hydrolock condition. Any water in the oil? Unless you kept and kept trying to turn over the engine the starter shouldn't be fried. Could you smell it like the other member did?

Is backing off pretty hard before the no wake zone a bad thing? I've been doing it for years without any knowledge. Enquiring minds want to know.

Certain engines have issues with that. Mine is one of them. Yes you should come off plane slowly. I'll find a good post for you to read.

https://www.perfprotech.com/blog/uncate ... d-checking

Another one

https://forums.iboats.com/forum/engine- ... ions-vinny

Another

http://www.marineengine.com/boat-forum/ ... lease-help!

[Basketballtitan]

I did smell the smoke I smelled electrical. When we came into the no wake we throttled down slowly not abruptly. In talking to cobalt and the dealer I to was ask how I was driving the boat. I did get a call from Volvo Penta yesterday who told me they were unaware of these types of problems with the motor but would get with their technical department. I did refer them to cobaltchat.com to see at least one person with a 2019 with a problem seemingly just like mine. They also stated they would talk to Cobalt on Monday with their “key customer cobalt specialist”. I have yet to hear any response from my first conversation with cobalt unfortunately. I did talk to the dealer yesterday and am optimistic after that conversation I really feel he is understanding this should not of happened especially to a new boat with less then 11 hrs on it. He too was going to reach out to Volvo penta. Will keep everyone updated on how this goes.

[Big Block Power]

I love these guys on OSO.

https://www.offshoreonly.com/forums/gen ... rsion.html


Guys open the pdf file on this thread its very good.


https://www.offshoreonly.com/forums/do- ... ained.html

[AsLan7]

I love these guys on OSO.

https://www.offshoreonly.com/forums/gen ... rsion.html


Guys open the pdf file on this thread its very good.


https://www.offshoreonly.com/forums/do- ... ained.html

.
Hey that was some good reading BBP. Thanks for posting those.

I wonder if something changed with the risers of these newer engines? . The PDF riser data is current through 2002.

[Big Block Power]

Yea it's old stuff but still neat to read. Exactly what did they change to be more efficient? We weren't in the boat so hard to tell what happened with both of these but troubling for 2 in 1 season.

[Basketballtitan]

A little update for everyone talked to the dealer yesterday and apparently there’s a bracket on the block that holds the starter that cracked as well now they are leaning towards a new motor replacement which I think at this point would be best for everyone. In talking to the dealers mechanic in a little more detail he did also say all eight cylinders had water in them when it Hydrolocked real happy with how the dealer is handling everything will let everyone know the outcome hopefully soon

[Lockey14s]

Interesting read BBP! thanks for posting that PDF. I think it explains some of my problem with mist walking back up my manifolds. I have the 1981-2002 style manifolds on my 78 that dont have that lip. engine runs fine and no sign of water in the oil, but when installing captains call exhaust i notice the "misting". Also im on the hairy edge of needing an extra riser block so that could be part of the problem too. but i build the engine for dirt cheap so i really dont care too much haha. I DO come off plane reeeeally slowly though.

IMG_3152.jpg

IMG_3154.jpg

[akorcovelos]

Seems odd, I've never had issues with coming hard off plane, or even backing up faster than idle speed. There are times when water pressure against the exhaust is out of your control, like on big water where following waves are pounding the transom. That's why they put flappers in the exhaust. This seems like a poor design by Volvo to me.

[AsLan7]

Seems odd, I've never had issues with coming hard off plane, or even backing up faster than idle speed. There are times when water pressure against the exhaust is out of your control, like on big water where following waves are pounding the transom. That's why they put flappers in the exhaust. This seems like a poor design by Volvo to me.

.
It is a conundrum.

.


.

[Big Block Power]

Interesting read BBP! thanks for posting that PDF. I think it explains some of my problem with mist walking back up my manifolds. I have the 1981-2002 style manifolds on my 78 that dont have that lip. engine runs fine and no sign of water in the oil, but when installing captains call exhaust i notice the "misting". Also im on the hairy edge of needing an extra riser block so that could be part of the problem too. but i build the engine for dirt cheap so i really dont care too much haha. I DO come off plane reeeeally slowly though.

IMG_3152.jpg

IMG_3154.jpg

Glad it helped. Yes it's a very good read. I would space it up. How far above the water line are you. Get the beak!!

But this hydrolock. It's great to know they are shooting for a engine. But the real question so it doesn't happen again is why? Without solving that it can and will happen again.

[Lockey14s]

Interesting read BBP! thanks for posting that PDF. I think it explains some of my problem with mist walking back up my manifolds. I have the 1981-2002 style manifolds on my 78 that dont have that lip. engine runs fine and no sign of water in the oil, but when installing captains call exhaust i notice the "misting". Also im on the hairy edge of needing an extra riser block so that could be part of the problem too. but i build the engine for dirt cheap so i really dont care too much haha. I DO come off plane reeeeally slowly though.

IMG_3152.jpg

IMG_3154.jpg

Glad it helped. Yes it's a very good read. I would space it up. How far above the water line are you. Get the beak!!

But this hydrolock. It's great to know they are shooting for a engine. But the real question so it doesn't happen again is why? Without solving that it can and will happen again.

I know i probably should space it up, i think im about a foot above water line. but even with people on the back of the boat it never has spilled over into the cylinder.

Yes I agree, they are having some kind of different issue on their newer motors. its taking a big gulp of water for some reason, not mist over a long period of time. I dont think the dealers are trying to blame the operators, but more find out what lead up to that situation.

[Big Block Power]

The good thing it's not the 430. Those babies are trouble free. Must be all of the different parts they put on it. Or just the diff timing from the ecu. Lol

[Lockey14s]

The good thing it's not the 430. Those babies are trouble free. Must be all of the different parts they put on it. Or just the diff timing from the ecu. Lol

Hahaha must be!

[Basketballtitan]

A little more of an update. Volvo Penta emailed me on Monday and they wanted to know how much water was in the boat, how much gas was in the boat, how much gear was in the boat,how much ballast if any was in the boat, and how many people were on the boat. I sent all that back to them Monday and have heard nothing since then. Still waiting

[Big Block Power]

A little more of an update. Volvo Penta emailed me on Monday and they wanted to know how much water was in the boat, how much gas was in the boat, how much gear was in the boat,how much ballast if any was in the boat, and how many people were on the boat. I sent all that back to them Monday and have heard nothing since then. Still waiting

It's good they are asking. It's not a surf is it?