I don't know the exact alloy. It is listed as an "aluminum-magnesium" alloy, which the only ones I know are the 5xx.x series. These would be similar to the wrought series in hull
I didn't mention anything about outboards, so don't know why that is directed at me. But I do know many outboards that spend years primarily submerged in saltwater. BTW, it is worse for those to be in/out of saltwater than to stay submerged - unless they get fresh-water flushed between.
I neither like nor dislike saildrives. I'm certainly not a "proponent" Same for shaft drives or any particular engine
. I have owned several of all types. So far, the only transmission
problem I have had was with a Hurth gearbox
. I don't read anything into that.
I look for good specific engines and transmissions when considering them. For example, the Volvo
200x series were truly bad engines overall. However, the Volvo
(nee Perkins) 20x0 series are fantastic engines with none of the issues of their predecessors. Likewise, I would have no problem with a Yanmar
, but not have the 40.
Many, perhaps you, color everything Volvo based on experiences with a particular model/generation or two and do not see things more relatively. I can list you a few Yanmar
model horror stories, as well as Westerbeke
, etc. Sounds like your friends in the other thread had a few Yanmar issues themselves.
When choosing a boat, if the brand of engine
system matters, then choose around that - I support that. This leaves out a vast amount of catamarans if one is interested in those. As well as certain brands and models of monohulls. For us, we wanted a catamaran
. The issue of saildrives and engine brand were not a problem, but there were very specific individual drives/models that we would not take, and we required a well-maintained system. This only narrowed our choices marginally.
Do you not know anyone at all with saildrives that work well and have no problems (I don't count)? Or does your intense bias only allow you to see and remember those that do have problems? Maybe the S. Pacific is the graveyard for saildrives?
For example, we are sitting in an area right now with probably a thousand or more boats and I would guess that 35-40% of the engines have saildrives (large number of catamarans and they have two each). These saildrive
problems that you find so prevalent simply are not occurring here. Boats are moving in and out of yards and no one is working on saildrives. Really. Multiple hundreds of boats in the yards and no one has saildrive problems. The rest are in the water
and no one is working on, or talking about, saildrives.
I take that back. There is one boat that took a large lightning
strike that blew out everything. They have something wrong with one of their drives. I'm sure a shaft drive would have survived that better.