The 465's we had were prone to water reversion with the wet pipes. Merc kept doing head and valve warrenty work in the first 30 hrs. I was surprised with the Merc guys from the factory coming to look everything over they could not figure out the wet exhaust problem.
Doller Offshore installed dry exhaust for us and never had another problem. In fact the engines went somewhere over 400 hrs. with the owners that I sold the boat to and they knew nothing of how to take care or run a boat of that type. I did remove the water pumps and went to crossovers and then they and the boat really came alive. Needed to reprop then. |
I remember the owner had problems with reversion/water intusion and that is why he had the engines rebuilt.
If you want to find out a little more about the boat, use the search and do an advanced search with the screen name faceoff. He used to be on the board once in a while and made some postings with some upgrades and minor issues. |
Originally Posted by chuckbeecher
(Post 2292941)
The 465's we had were prone to water reversion with the wet pipes. Merc kept doing head and valve warrenty work in the first 30 hrs. I was surprised with the Merc guys from the factory coming to look everything over they could not figure out the wet exhaust problem.
Doller Offshore installed dry exhaust for us and never had another problem. In fact the engines went somewhere over 400 hrs. with the owners that I sold the boat to and they knew nothing of how to take care or run a boat of that type. I did remove the water pumps and went to crossovers and then they and the boat really came alive. Needed to reprop then. |
Originally Posted by Griff
(Post 2292954)
I remember the owner had problems with reversion/water intusion and that is why he had the engines rebuilt.
If you want to find out a little more about the boat, use the search and do an advanced search with the screen name faceoff. He used to be on the board once in a while and made some postings with some upgrades and minor issues. Is it a head problem, allowing the water intrusion? Or too much cam? I saw the specs, here on another thread, profile didn't look all that radical, but I didn't see what the overlap is. |
I'm not sure what was causing the reversion for him. He chased the issue for while and then finally just did rebuilds. The early HP500's had reversion issues also and Merc ended up changing the Gil risers to a taller version.
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Originally Posted by rangerrick63
(Post 2292965)
What is involved to swap to a dry exhaust? I've only seen a couple of boats with the dry exhaust, & I did wonder how they were cooled.
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Originally Posted by Griff
(Post 2293012)
I'm not sure what was causing the reversion for him. He chased the issue for while and then finally just did rebuilds. The early HP500's had reversion issues also and Merc ended up changing the Gil risers to a taller version.
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I had to replace my Gils on the Pantera at 8 years old. The manifolds had internal hairline cracks. He may have changed to the newer style HP500 risers which should eliminate any reversion.
Got any current engine pics??? |
Originally Posted by Griff
(Post 2293724)
I had to replace my Gils on the Pantera at 8 years old. The manifolds had internal hairline cracks. He may have changed to the newer style HP500 risers which should eliminate any reversion.
Got any current engine pics??? |
[QUOTE=Griff;2293724]I had to replace my Gils on the Pantera at 8 years old. The manifolds had internal hairline cracks. QUOTE]
Do you think any of that was due to saltwater use? I guess, in a broader context, what is the expected lifespan of an exhaust package? |
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