Stainless steel exhaust risers-gctid405583

[Guest]

Just want to pass along the great customer service that I just got. Going on 4 years ago, when I needed replacements for my Hino W06's, I decided to go stainless. I chose Greenwater Exhaust.

Last week, in the San Juans, I developed a leak in the starboard riser, first time. I emailed Dave at Greenwater that night, and he called about 8 am next morning. He gave a couple of options, i decided to use jb weld to patch it and return home slowly.

Dave asked that I return both risers and he would repair and modify at no charge. He turned them around and shipped back to me Fed Ex next day service. I put them on last night, and they work perfect again.

The other guys (National Marine) are probably very good as well, but I just thought I would pass along tahe excellent support I received. I have the highest regards now for 2 companies : Greenwater and Weaver Davits.

[Guest]

I also got my risers from greenwater . But 4 yrs and you already had a failure ? They only offer a 5 yr warrentie. Your lucky. There's a lot off welding on those risers,i'll have to keep a better eye on mine.

[Guest]

I just had to replace my port riser, it was built in 2003 by National Marine Exhaust.

[Guest]

Were they ceramic coated? The welding rod used is not pure 100% stainless and that is what typically fails. I also have the Greenwater risers and Dave suggested ceramic coating will increase the service life greatly.

[Guest]

Stray Cat wrote:
Were they ceramic coated? The welding rod used is not pure 100% stainless and that is what typically fails. I also have the Greenwater risers and Dave suggested ceramic coating will increase the service life greatly.

Mine were not ceramic coated. I was told that an internal baffle had failed and that this failure would lead to more severe failures in the thinner outer housing. Scott showed me a similar failed unit that had been cut in half. The baffle looked like swiss cheese from corrosion.

[Guest]

hughver wrote:
Mine were not ceramic coated. I was told that an internal baffle had failed and that this failure would lead to more severe failures in the thinner outer housing. Scott showed me a similar failed unit that had been cut in half. The baffle looked like swiss cheese from corrosion.

Hugh has the "Riser Can / Muffler " type riser which is much different than the Greenwater risers. It is like apples and oranges. We use 316L rod to weld our 316L stainless to build the parts which is standard procedure. Dave would definitely know which rod to use as well. We do not typically ceramic coat our risers unless a customer requests it. We replaced some ceramic coated water cooled turbo elbows for Laconner Maritime that were only 3 years old. (I don't know who the manufacturer was.....Someone in California???) The new ones we built were not ceramic coated and still looking new after 10 years of service. I still prefer the passivation of stainless to remove the surface contaminants from the fabrication and welding processes.

[Guest]

Hello all,

The filler rod used was 316L and the risers were ceramic coated inside and out. Jim's boat has the aft cabin and his exhaust system is laid out differntly than most. His port riser points aft like most others but his stbd riser is rotated 90 degrees forward and points to the side so the mount coming up from the engine block that supports the riser is missing. The leak was a stress crack because the riser/hose was not supported. Shortly after I built Jim's risers I changed the design and the WO6 and EH700 have internal support to eliminate any chance of cracking if the rear is not used.

When I had the risers here I cleaned the inner exhaust pipe to check for pitting. The ceramic coating is still in place and there is no pitting at all. I would think that now Jim's risers have the extra support they will likely last the life of his engines.

Dave