Good morning, we motored over from the marina to our mooring, it took about 45 minutes at 2000 rpms. I have a Westerbeke w27. When we got on the mooring I went down to turn off the batteries and I could seem exhaust fumes in the cabin. No blue smoke that I could see. I started the motor and checked the exhaust mixing elbow and the breather from the head to the air intake box. I could not see an obvious leaks they all appear intact. The water muffler is stainless steel and I could see no leaks on the connections.. There is a good amount of water and exhaust coming out that back. Any ideas on where to look or how to figure this out would be appreciated.
Thanks
Peter Farley
Knot in a Hurry u30 #328
Keyport NJ
You said you checked the exhaust elbow, but normally the part of that coming out of engine block is surrounded by some kind of insulating wrap. That’s very hard to inspect.
I’ve attached a picture to illustrate. As you can see, this is a very corrosion-prone part, and also very heavy. The insulation in this case is the white fiberglass tape visible on the right, wrapped around the dry part of the exhaust between the riser and the cooling water inlet at the top, and held on with (rusty) wire.
I wonder if your exhaust smell might be coming from the hard-to-see area under the insulating wrap, or if the connection to the engine block (covered in this picture by the “st” in “exhaust”) might have just enough leakage for the smell to come through without necessarily emitting visible smoke.
I had this happen to my Universal 25xp, it took a bit of looking but it turned out it was the vent hose on the valve cover. It just “fell” off as there is no clamp on my engine. Hot oil fumes will come out. Just my experience.
Dennis
Poco 26U 1989
I recently overhauled my engine. Mark is correct about checking the exhaust manifold. In removing the manifold on my W27, the nuts were challenging to remove (hard to get to), and I found most to be no better than hand tight. Either they had loosened over time, or someone previously had not been able to re-tighten them due to oversized fingers! The gasket on the manifold to the exhaust riser should be checked as well. I made this particular gasket out of exhaust manifold gasket sheet that I purchased from Napa. If you do remove the exhaust manifold itself, you will need to purchase that exhaust manifold gasket and be sure to clean the surfaces for the new one.
Well I found the source of my problem. The injector closet to the front of the motor is leaking compression from the seal.
This caues soot and exhaust fumes to be blown into the engine room. Now I have reaplced the riddle with a puzzle, how to get the injector out.
I will ask in a seperate thread
