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Old 06-21-2010, 12:31 AM   #1
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Default AC and Cruising RPM...2800 SCR

Took my first cruise this weekend...about 50 miles round trip. Was great!

With the twin 4.3 I cruised at 3400 rpms at 26 mph. Is this typical for two people and a full tank of gas?

I also had my AC shut down and discovered the coil was iced over. Let it thaw and work fine. Is this a typical problem?
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Old 07-02-2010, 03:19 PM   #2
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RPM's & MPH/KPH are going to vary slightly with trim, amount of tabs being used and sea conditions. I would say this sounds pretty good for overall cruise. I've never had my AC coils ice over that I'm aware of, but I don't use it that much or for long periods of time. I'm curious to hear other's thoughts on this, but I've always tried to run at around 75% or so of the Max. RPM when conditions warrent it. Often a bit higher.
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Old 07-03-2010, 05:16 AM   #3
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I've ran my AC system for days on end....icing can mean a few things.....low coolant levels.....not enough air over the coils....too much humidity....etc....so...if it keeps icing up..I'd get a technician to check it out..

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Old 07-05-2010, 02:30 PM   #4
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No problems this weekend...ran the AC for three days with no ice buildup. I turned the thermostat off of max cool and I think the cycling helps. Purchased a Honda EU2000 and noticed the reverse polarity light flickers..Used my circuit test and it showed a problem but the owners manual says that the generator will not test the same as a house circuit. Has anyone else noted a polarity alert?
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Old 07-05-2010, 03:13 PM   #5
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yeah..not a biggy since it's AC...alternating current....portable generators are notoriously dirty electrically......just keep an eye on it....


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Old 07-06-2010, 10:36 PM   #6
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Thanks...Not sure what to look out for but if everyone else is using this generator so can I.

Now regarding batteries - So my house batter worked great. It ran my refrigerator all night. turn on my GPS and got a weak battery message. I didn't want to run the generator all night and figured I could charge the house battery while underway. Am I correct to believe my alternator output will charge my house battery with my quest switch on both?
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Old 07-06-2010, 11:31 PM   #7
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works the same as your car....it produces electricity to charge the batt. and power the systems on the car...the boat is designed to run on the house batt. when anchored for a few hrs but then if need be..switch to a start batt.....now if your batt. is weak or too small...then it's going to be depleated sooner.....then a larger batt. is required....some folks take out the group 24 batts on a 2800 scr and drop in a group 27 batt...much larger batt and will power your systems longer..however you may need to upgrade the alt. to a unit that puts out more for charging.......


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Old 07-09-2010, 12:21 AM   #8
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Does anyone know how many amps my 4.3L engine/alternator puts out?
Based on the many blogs concerning the eu2000 reversed polarity alert I will ignore like everyone else.
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Old 07-25-2010, 12:20 PM   #9
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Milt/Seapuppy....I just purchased my first boat, a 2800 SCR. I have spent 2 nights on it and both times woke up with the A/C barely blowing air, and not cold air. I turn it off, wait a while, turn it back on and it gets cold again..but only for a short period of time. Also, it did not come with the owners manual and I can't seem to find a 2009 MAXUM 2800 SCR? Any help is appreciated!!
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Old 07-25-2010, 11:28 PM   #10
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My 2800 is 1997...many changes since. I have no problem scanning and sending my manual but not sure it would be of use to you??? I stopped setting my AC to MAX and haven't had it ice up again (allowing the AC to shut off may be like a thaw cycle???)
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