MapisM
Well-Known Member
Never heard of that. I'm aware of boats whose E/R gets awfully hot right after the engines are turned off, unless you leave the fans on for some time.
But if that would happen underway, to the point of affecting engines operation, the least thing that the builder should do is fit an alarm that goes off whenever blowers are defective - something I never came across in any pleasure boat.
That said, I disagree with Amati's choice to not fit any blowers, for two reasons:
1) as already mentioned, they are useful if for any reason you wish to enter the e/r after coming back to your marina, unless enjoying a sauna inside it is your thing.
2) they can indeed be useful also underway, whenever you want to (or you must, as when cruising in a channel) keep a very low speed for some time. In such conditions, the engine-driven air exchange is reduced to a tiny fraction of what it is at higher rpm and with the turbos working, with the result of increased e/r temp - which btw is something on which also the engine manufacturers put restrictions, at least in terms of desired (possibly even mandatory, not sure) installation requirements.
For the records, the way DP tackled these needs is rather peculiar (at least, I never found it on any other boats), but I think it makes good sense.
The blowers are automatically turned on/off by two thermostats, one of which is active while the engines are on, and the other while they are off.
Both can be set at any temperature, but the recommended setting is 45°C for the first and 55°C for the latter.
The rationale is that it's more important to cool the air the engines are breathing, rather than keep the blowers running upon arrival just for the sake of cooling down the e/r faster (you can always turn them on if you need to go down, of course).
I never saw the blowers warning light popping up on the dashboard while cruising at P speed, but they are often on after some slow speed cruising, depending obviously also on external temperature: if it's 35°+C outside, it doesn't take much to reach 45°C inside the e/r...
True, and that's precisely the reason why coolers on the fuel return are fitted as standard in some engines.
They are also retrofittable anyway, as already debated in this thread, whose subject was just about the same as in this one, btw.
Highly recommended, because the engines are grateful, first and foremost. Improved e/r comfort is just a by product, so to speak.
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. Although as an aside i'm feeling cold now when it drops below 65F!
