Join Date: Dec 2009
Location: Charlestown, MA
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volvo penta MD2030 impeller question
We have a Pearson 34 which was unfinished when (then) Cal-Pearson folded. It was later finished and sold by Bristol Marine. They put a Volvo Penta in it. The engine has very low hours with only light usage for two seasons (one since we've owned it). I'm embarrassed to say that I've never inspected the sea water impeller - until yesterday. (Actually judging by how the green paint was still uncracked around the screws, it looks like the first owner didn't either)
I was surprised to see this brass insert along the wall of the housing as seen in the photo. As you can see, it completely bends over the fins of the impeller as it turns which I would think would tear it to shreds. Apparently not though. I've looked at lots of photos on the web of other housings and have only seen this in the Volvo. Does anyone know why Volvo does this and what the purpose is?
While searching, I also learned about SpeedSeal covers. I'm thinking that looks like a good idea.
Thanks in advance
-Capt. Bob and Linda (owned by Fujin)