This atrocious piece of fabrication is the source of the problem, the small tube injects raw water into the mixing elbow to cool the exhaust, as you can see the tube blocks about 50% of the exhaust flow before all the rust , corrosion and carbon completely blocked the rest of it. Thankyou very much brilliant genius engine installer, there are other issues, unreinforced engine mounts, the aft one was broken due to a lack of gusset.
The end result was that the soot and unburnt fuel was forced back down into the piston rings causing them to stick and thus we lost compression, no compression , no ignition.
The good news is that all the important parts show practically no wear, so we shouls only have to replace the rings and get the block honed. We may replace the crankshaft and piston bearings as we have everything apart anyway so it would be a good oportunity.
Michael
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