Exhaust elbow

[mr c]

Has anyone gone from this elbow



To this elbow



If you have. Any problems? Is it stainless steel? Does it get clogged like the original one?

 

[Ralph Johnstone]

I'd Do It in a Heatrbeat ...........

........... if it wasn't for the fact that my engine is jammed into a NIKE shoe box. The existing 180 deg. elbow comes within a 1/2" of the cover.

I'm pretty sure that the rapid change in direction of the high speed gasses is what causes the carbon particles to drop out and cause plugging of the 180 deg. elbow. I suspect the straight through design would be much less inclined to plug.

I'm not sure what the carbon deposits might do to the SS constructon material unless it's 316 or better.

It will be interesting to hear what success others have had in switching to one of these units.

 

[woodster]

Has anyone gone from this elbow

View attachment 84144

To this elbow

View attachment 84145

If you have. Any problems? Is it stainless steel? Does it get clogged like the original one?

the one difference i see is that by going that way you give up your high loop on the exhaust pipe and run the risk of backing water in the the manifold

 

[Ralph Johnstone]

the one difference i see is that by going that way you give up your high loop on the exhaust pipe and run the risk of backing water in the the manifold

Woody ....... yes, looks as if one could be loosing 6-8" by eliminating the riser and coupling.

Requires some veeeeeeeery careful measurements before proceeding.

 

[Rich M]

I had the opportunity to replace the exhaust elbow on my 1985 28.5 with a 2gm about 10 years ago. I was presented with both elbows and chose the stainless with the straighter flow. It was actually easier to put on and the only change I needed to make was to shorten the exhaust hose just a couple of inches. I have had no issues and probably need to slide back the exhaust hose and visually examine the inside. As far as loosing the back flow prevention of the high loop my exhaust hose rises to almost the top of the locker. I'll also admit to being more of a fair weather sailor and wouldn't be out in a following sea large enough to cause a problem. I'm also interested in what others have experienced, but I'm very happy with the decision I made.

 

[mr c]

Rich M.
So yours is not painted like the photo? When given the choice was the stainless part aftermarket or factory replacement?

 

[Rich M]

I think it was not painted, it looked very much like an exhaust pipe one could purchase for their car. I bought it at Brewer's Marine parts department in Stamford, CT. In the Yanmar manual for my engine both are included in drawings. I based my decision primarily on what I thought would be improved air flow. ( think glass pack muffler vs. Stock). I honestly think the engine "breathes" better. If I were to have to replace it today I would buy it again. They were just about the same cost, but that is from memory.

 

[uncledom]

Unfortunately Brewer's East is no more.

 

[Rich M]

Obviously it's been a while since I was up there, but the guys at Brewer's "west" had a great parts & service department.

 

[uncledom]

You're right, it's west that's gone. There are just docks on the east side. You need to go to one of the other 23 Brewer locations for a haul or parts.

 

[Rich M]

Wow, did someone else take over the operation? I left that area several years ago.

 

[uncledom]

Wow, did someone else take over the operation? I left that area several years ago.

No, it's still Brewers but the town wouldn't renew the lease on the west property. They are building a monstrosity on that site.

 

[Rich M]

So back to the original question, I find it very surprising that there are no others that have gone to this " different" exhaust elbow! Has anyone had a bad experience?

 

[Charles Erwin]

The reason others do not use the elbow under discussion is because it will not work in deeper hulls. In short - the elbow you are considering works great in the family runabout but probably not so well in a sailboat.

This is because there are minimum vertical dimensions that one must honor when one installs a wet water lock exhaust system. These dimensions include specified minimum distance from exhaust system relative to the water line. The deeper the hull - the higher the loop (or vertical rise) you need. The elbow under consideration here has no rise and presents a risk of sea water flooding the exhaust system.

See http://www.yanmarhelp.com/s_wtrine.htm for more comment on this issue.

Charles

 

[Nereussailor]

I think it was changed in the newer boats. My 83 H30 came with the stainless elbow on a 2GM. There is a loop that brings the exhaust up above the waterline at the exhaust outlet by the transom. Mine has never plugged up I've cleaned it twice. The first time was when I bought the boat 10 years ago. The second time was just recently. It could have went another 10 years.