Hydrolocking Mercruiser 4.3L

[mercruiser4.3]

My 1996 Mercruiser 4.3L vortech Keeps Hydrolocking if it has been sitting for more than two weeks. i keep it on a trailer not in the water. need help any sugestions will be great

 

[nola mike]

Re: Hydrolocking Mercruiser 4.3L

My 1996 Mercruiser 4.3L vortech Keeps Hydrolocking if it has been sitting for more than two weeks. i keep it on a trailer not in the water. need help any sugestions will be great

as in water in your cylinders? check your manis/risers/gaskets.

 

[mercruiser4.3]

Re: Hydrolocking Mercruiser 4.3L

yes water in the cylinders and the exhaust manifolds are the one piece kind

 

[Bondo]

Re: Hydrolocking Mercruiser 4.3L

and the exhaust manifolds are the one piece kind

Ayuh,.... There's your Problem, Right there,... Their Leakin'....

 

[mercruiser4.3]

Re: Hydrolocking Mercruiser 4.3L

I was thinking the exhaust manifolds might be leaking into the cylinders while it was sitting for periods of time so i tried draining them before letting it sit but it would still hydrolock after sitting for a couple weeks or so im wondering if might be something else or if maybe there is still some water left in them after draining.

 

[Bt Doctur]

Re: Hydrolocking Mercruiser 4.3L

They need to be replaced, not drained

 

[mercruiser4.3]

Re: Hydrolocking Mercruiser 4.3L

when i bought the boat last year from a dealer he told me that the manifolds had been replaced because the old ones had cracked so im thinking they are good

 

[alien4fish]

Re: Hydrolocking Mercruiser 4.3L

hhhmmmmmmmmmmmmmm................................... interesting

 

[nola mike]

Re: Hydrolocking Mercruiser 4.3L

when i bought the boat last year from a dealer he told me that the manifolds had been replaced because the old ones had cracked so im thinking they are good

open cooling system? unless you have a crack in your block, where else could it be coming from?

 

[sgm26]

Re: Hydrolocking Mercruiser 4.3L

I had a water leak a couple years ago and a hydro lock. When i tried starting the engine, it snapped the starter bolt. Had to remove the engine to replace it. Did a complete overall, and thought the water leak was corrected. Today I just snapped another starter bolt. but there was no sign of water leak yet

However it did have a grinding sound when I started it but then would start and run fine but half way through the day, the starter just started spinning and I had to be towed home.

Any ideas what else might cause this starter problem?

 

[nola mike]

Re: Hydrolocking Mercruiser 4.3Lx

Re: Hydrolocking Mercruiser 4.3Lx

I had a water leak a couple years ago and a hydro lock. When i tried starting the engine, it snapped the starter bolt. Had to remove the engine to replace it. Did a complete overall, and thought the water leak was corrected. Today I just snapped another starter bolt. but there was no sign of water leak yet

However it did have a grinding sound when I started it but then would start and run fine but half way through the day, the starter just started spinning and I had to be towed home.

Any ideas what else might cause this starter problem?

This would be better served by starting a new thread...

 

[mercruiser4.3]

Re: Hydrolocking Mercruiser 4.3L

yes its a open cooling system