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51 220 Engine Won't Start

220 1951 MB Sedan
6 cyl
- we have compression of about 40
- Have spark
- PROBLEM ... compression coming through carb

The car sat for 1 year without being started. The only other time it was driven was just prior to that for 25 miles and there was no smoke either from exhaust or engine. The only smoke came from trying to start it and the started burned out. We replaced that and it never started again. It does turn over and has new spark plugs.

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Engine size for 300SD

Me again. I asked a question about my 1978 300SD with a bad engine. I can get a really great deal on a low mileage 300TD engine and would love the increased power. My dad thinks we can just swap them out as long as they are the same size. Is there a size difference? It is hard to tell by looking and is really hard to measure.
Or should I just keep looking for a nonturbo engine?
(Don"t know how long the turbo engine will be available so please tell me something)

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