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malibu.c.c

When To Change Manifold Risers On Salt Water Engine?

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malibu.c.c

hi

boat is vlx 2008 model with saltwater engine and saltwater package,( 340 monssoon with cats)

boat is flushed after ever use and has 300 hours on it..

boat runs perfect just wandering when risers need changing ,

someone told me they could look perfect on the outside and rusted and worn inside..

is there anyway of knowing when they need change so no damage is done to engine ?

thks

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martinarcher

That's a tough one. It really depends on age, hours, salt content, how well it is flushed etc. If I were you i would pull the manifolds every year or every other year and have a peek inside to see what they look like.

I just changed manifolds on my boat this spring. It has about 500 hours on it, but the real reason I think the manifolds were rusted through was it is 25 years old. The port side manifold was starting to drip through a rust pin hole.

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REW

That's a tough one. It really depends on age, hours, salt content, how well it is flushed etc. If I were you i would pull the manifolds every year or every other year and have a peek inside to see what they look like.

I just changed manifolds on my boat this spring. It has about 500 hours on it, but the real reason I think the manifolds were rusted through was it is 25 years old. The port side manifold was starting to drip through a rust pin hole.

I'm going with MA on this one. The only way to see how bad the corrosion is will be to open it up and take a look. http://www.harborfreight.com/digital-inspection-camera-67979.html You might be able to take a peek inside with the camera listed through the exhause and not have to remove the riser. If this will work the inspection can be done every year with just by removing a few clamps.

Let us know how it looks inside.

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Bake's Marine

On a catalyst engine there is NO raw water going through the exhaust manifolds. Water is introduced at the stainless steel dump after the catalyst.

Considering that, you should NEVER need to replace your manifolds.

-Paul

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REW

On a catalyst engine there is NO raw water going through the exhaust manifolds. Water is introduced at the stainless steel dump after the catalyst.

Considering that, you should NEVER need to replace your manifolds.

-Paul

Now that is what I call good news. :yahoo:

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malibu.c.c

great news paul thks !!

thks also to all the other feedback from the crew !

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Bake's Marine

You are very welcome!

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