Suspected Exhaust Leak

[Tim]

If you need a stand pipe, I've got one that can be yours for the price of shipping or a road trip to Crown Point Marina in Gloucester. It came with a used A4 that I bought 14 years ago, my boat has a water lift and I can't use the stanpipe.

[alcodiesel]

Thank you Tim. What is it make of, copper?

[Tim]

Yes, it is copper. I hooked it up to an A4 rebuild a couple years ago and it seemed to work with no leaks.

[alcodiesel]

stand pipe, water lift, riser

Hi Neil, it most closely resembles the standpipe drawing. The exhaust hose runs down hill all the way.
Sorry the pics are so huge. If I made 'em smaller they were inverted no matter what.

What do you think?

[ndutton]

Yep, standpipe. No question.

[alcodiesel]

Thanks Neil. Now where does one get one of these?

[ndutton]

Thanks Neil. Now where does one get one of these?

You have a couple of choices, both a result of your activity on this forum. Tim has one he has offered you for the cost of shipping and Moyer Marine sells brand new stainless standpipes in their online catalog. Do not be concerned if the water injection point is in a different location. Yours looks unusual to me.

[alcodiesel]

Tim, I'm up for a little road trip. Thank you for offering your standpipe. I am free most any time. Let me know where and when.

[ndutton]

I suggest a pressure test before installation. I'm not saying there's anything wrong with Tim's standpipe, just that it's better to know for sure before installation. I've bought and sold a couple of used heat exchangers and each one of them was pressure tested prior to installation.

[TomG]

Are these pictures upside down?

I know not all standpipes look alike, but having the water injection at the bottom and exhaust leaving the standpipe at the top seems backwards.

[ndutton]

Tom, see the last sentence in post #22

[TomG]

Yeah, me too Neil.

Are you thinking what I'm thinking?

[ndutton]

Are you thinking what I'm thinking?

No. It seems everybody has their own idea of marine exhaust design and what Alco has is just another permutation. I've posted S&S standpipe drawings in the past that show design revisions, the early model had a higher discharge (can't attach anything right now but the forum administration is working on it). In Alco's case, a high discharge may be necessary to achieve the down hill run to the transom, I just don't know. If he follows the drawings carefully he'll be good.

I noticed Tim's standpipe is the more conventional design.

[alcodiesel]

I'm going to see how much of a drop from the top and bottom of the current standpipe there is. It may be only a top discharge will work with this boat which would point to a custom built stand pipe or switching to a water lift.

[toddster]

Maybe a little late here, but the last page of the Ericson manual should be a drawing of the standpipe. You could take that to a machine shop and ask for an estimate to fabricate one out of iron pipe.

Water went in the bottom and filled the outer jacket, then mixed with the cooled exhaust at the exit pipe.

Let's see...


Everything above the exit pipe was wrapped in insulation, and that part also gradually rusts away.