Next thing to fail? exhaust pipe?

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pcatterall

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When I eventually get the starter fixed ( what a saga!!!) I have made a list of the next things to prevent sailing.
Top of the list is the exhaust from the manifold which is so rusty I darn't start any explanatory chipping. This is about 2" ID steel welded at one end to a stainless flange and into some sort of egg shaped adapter and flange at the manifold end, the steel looks like it has some flex in the design presumably to absorb vibration. I plan to photograph this.
My question is what is the best way to get this replaced? At the moment I plan to get the photos and the best measurements I can then take them to some sort of local engineer for comments/ cost and time. I would then remove the whole section and bring it back to the engineer for a quick fabrication job ( the 2 flanges look re-useable)
Does this idea sound ok and what sort of 'engineer' should I be looking for??
Thanks as usuall for any advice.
 
[ QUOTE ]
sort of 'engineer' should I be looking for

[/ QUOTE ] A small local engineering firm that can do general steel fabrication and welding. I know several in this area I would visit but that's no help to you. Try a tour round some of the smaller industrial estates and yellow pages.

Any flexible sections may be a problem but if it's going to connect to a hose that may not be necessary.
 
Thanks VicS, The pipe run has no hose in it so some flex seems required, having said that the existing one looks like it has 'never flexed in anger'. I suppose an issue with a local engineer will be sourcing the pipe.
I think I will post the photo when I get it
(picture= 1000words!!)
Cheers
 
I have had a similar problem. Twice, with different engines.

The first time was on a BMC Captain, where the injection elbow was found to have a crack. It was taken away by a friend who had a friend who had the equipment to weld cast iron. When it did not come back and the boat was due to be relaunched, I acquired some galvanised pipe fittings (one 1 1/2" elbow, one 1 1/2" X 1" x 1 1/2" T piece and a 1" male to 3/4" female reducer) and three short bits of 1 1/2" galganised steel pipe. I had access to a threading mathine and made up the replacement fitting. Not pretty but it worked. I got the re-welded original back later in the season and swapped them over.

The second time was when I found a large hole in the header tank/manifold of the Watermota Sea Panther of my present boat. The injection elbow was OK, but did not fit the flange of the replacement Bowman manifold. I had to buy the nearest one I could find to fit from the large selection offered by ASAP and slightly slot out the holes.

In both cases, the exhaust from elbow to transom was rubber. I think I would prefer a rubber exhaust to allow flexibility rather than the type of metal "flexible" echausts that I have seen on other boats.
 
I made the exhaust up for my new boat using sched 40 stainless pipe and standard weld elbows stick welded together. I also included a ball valve so the exhaust could be closed to stop water ingress or some one starting engine with authorization.
 
I had to rerun the exhaust on my T90. I described the problem to ASAP in an email and they came back with a recommended selection of elbows etc that all screwed together and produced just what I wanted and at half the price I had been quoted to fabricate the run. It was excellent service.
 
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