My E-28 always developes transom soot after a day out. The exhaust is located in the bottom center of the transom under the ladder and points straight back. The boat is powered by a Universal M3-20 18hp diesel that starts easy and runs relatively smooth for a 3 cylinder diesel engine. Is this common for a 20 year old engine with less than 900 hours on it? The design and balance of the boat seems to make it easy to bury the transom a little when you kick it up a bit. It makes it easy for the transom to pick up the soot in the water from the exhaust. The engine does not smoke at all no matter how hard you run it.
I cruise at 2800 rpms and the engine maximum in the water in gear under power is a little over 3500 rpms so I know she is proped right. The prop diameter 12" with an 11" pitch. It is a fixed 2 blade Michigan Sailor.
I am going on the 4th season with this boat and it has always done this. When I bought the boat it had 735 hours on it and the prop was than 12" x 12" so I had it repitched a bit for less bite and higher maximum rpms.
Any comments or suggestions?
Thank you in advance for your advice,
Sam of "Nauti Jo"
I cruise at 2800 rpms and the engine maximum in the water in gear under power is a little over 3500 rpms so I know she is proped right. The prop diameter 12" with an 11" pitch. It is a fixed 2 blade Michigan Sailor.
I am going on the 4th season with this boat and it has always done this. When I bought the boat it had 735 hours on it and the prop was than 12" x 12" so I had it repitched a bit for less bite and higher maximum rpms.
Any comments or suggestions?
Thank you in advance for your advice,
Sam of "Nauti Jo"
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