Not so much a solution, this one. Many owners reported that a longitudinal split in the exhaust elbow of the BUKH DV series engines was a common problem. One owner from the UK had fabricated their own replacement…
I make them from black malleable iron plumber’s fittings for my DV20. It costs less than £40 for the parts. I replaced the first one after four years, but it was still sound. Number 2 is now four years old, too! I think I’ll leave it alone for another year or so.
Blk Mall 45 deg M&F elbow-156 1 1/2 inch ~ qty 1
Blk H/W barrel nipple 1 1/2 inch ~ qty 1
Blk Mall sq tee – 161 1 1/2 x 1/2 inch ~ qty 1
Blk Mall 45 deg M&F elbow – 156 1/2 inch ~ qty 1
1/2 inch male bspt x 1/2 inch brass hose tail ~ qty 1
Plumbers’ merchants can supply all the parts.
There were also a lot of positive reviews of the “Kool-X” exhaust system. Available on Ebay, these are fabricated in stainless and shipped all around the world from Howth, Ireland. Expect to pay around $200.
There have been several generations of these, the latest being the Kool-X2.