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Old 06-15-2020, 04:47 PM   #21
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City: Taunton, Mass.
Vessel Name: Rise & Shine
Vessel Model: Prairie 29
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Time to have the nozzle assemblies tested for opening pressure and spray pattern.

If you reply with engine serial numbers, I'll check for service bulletins.

Good Luck!
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John R. Stewart
"Rise 'n Shine" Prairie-29, (formerly) "Driftless" Albin-25, Hull number 737
Dighton, Massachusetts, USA
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Old 06-15-2020, 05:16 PM   #22
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Stinky exauhast

Have you thought about the fuel itself. Did someone put some bio diesel , or a cheap grade of fuel or some cheap additives in the fuel? Maybe it would pay to have the fuel polished and tanks cleaned?
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Old 06-15-2020, 06:35 PM   #23
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City: Daytona Beach
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I have the same engine, a single with about 3000 hours, and normally cruise at 1200rpm, occasionally running up to 1500. It smokes a bit the first few minutes after starting; then clears up and runs clean. The exhaust has the normal smell of any diesel trawler but no unusual stink.

Hope you're able to resolve your problem. I'd follow up on the suggestion about checking your fuel.
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Old 06-15-2020, 06:54 PM   #24
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As a previous poster said, check your EGR. The drain valve can jam and the filter fills up. Also newer thermostats will help because they are normally rated hotter than the originals.

If you idle a lot or underload the engines you will get some oil build up in the air filter. Check the color of your turbo blades as well.
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