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Old 06-20-2012, 12:46 PM   #1
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Default New boat owner questions

I am a new owner of a 2000 Maxum 2300 Sc with a 5.7 mercruiser (250hp) alpha 1 Gen 2. This boat is completely stock with only general parts replaced (such as belts, pumps, starters, and batteries) No improvements have been made to it yet. I know it has the stock original propeller on the boat (only 170 hours when purchased) without any trim tabs. after taking the boat out all weekend I noticed a few things I would like to improve. I am only getting 32mph to 35mph between 3500 and 4500 rpm. for 1k rpm I only gain 1 mph or nothing at all. Also the need of a trim tab is nearly unbearable.

So the questions are what kind of propeller will give me higher top end and untilize the full rpm range without wasting fuel?

I noticed that there are pros and cons with using Smart tabs versus the bennett tabs....My boat is bigger than most posters with 18 to 19 ft boats, would the smart tab system work on mine with 90lb as stated on the website, better yet has any one tried it on a 23 ft boat?
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Old 06-20-2012, 02:47 PM   #2
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BB,

That boat with that power package running a half tank of fuel and 2 aboard should top out somewhere between 45 to 50 MPH at WOT. Assuming everything engine related is in proper order (and it would seem to be since you are getting it to 4500) then I'd still suspect the prop. The stock aluminum 3 blade prop should push the boat to at least 45 MPH.

As trim tabs go, I don't have any experience with smart tabs. I do have experience with Bennett's though, since I installed them on my 2004 2400 SC3 - which is similar to your 2300 SC. The smart tabs are considerably less expensive and easier to install but they do have limits. From reading forums and looking at all the boats in my marina (not one of which had ST's installed) I think the general concensus is that ST's may work well on smaller, lighter boats. Biggest compromise with ST's is you cannot adjust them while running to compensate for sea state or for weight distribution on the boat. Wasn't a compromise I was willing to make. If you choose adjustible tabs you might also consider Lenco's.

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Old 06-20-2012, 04:46 PM   #3
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BB.
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Old 06-20-2012, 07:39 PM   #4
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Also the need of a trim tab is nearly unbearable.

just curious on what is unbearable? boat leaning on plane, wind, or wakes?

I have the 2800scr and i drove it without a trim tab after it fell off, and now replaced them.

even the wind will roll the boat over on plane, but this boat has a larger profile.
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Old 06-21-2012, 08:31 PM   #5
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I have got a 1999 2300 SC with 7.4L and Bravo III and she will run right at 60mph. I have Bennett manual tabs on mine and highly recommend them, absolute day and night difference without them.
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Old 06-22-2012, 02:02 AM   #6
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My prop is original and a bit damaged, I wanted to figure out what would be the best prop to use, size, angle, and metal type. I am also probably going to add lenco trim tabs. Anyone have any assistance in this? Thanks in advanced
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Old 06-22-2012, 03:02 PM   #7
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Are you trimming out the drive at all when getting these numbers? I would expect to see the speeds increase somewhat as you trim the drive out. If the prop is damaged, you should definitely get that fixed. A 23 ft. cruiser needs tabs. I would look into the tabs first, then consider having the props tuned, then see where you are from there. Then consider replacing the prop and either selling the one you have or keeping it as a spare.
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Old 06-22-2012, 04:19 PM   #8
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I have a 2001. Top speed on mine seems to be around 42 MPH with a 19P prop. I have the smart tabs and they seem to work well.
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Old 06-22-2012, 05:06 PM   #9
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Trimming the drive once on plane will pick up a few MPH but not the 10 MPH that is missing. Tabs will help it get on plane a little quicker but of course won't do anything for top end.

At this point my guess is that the current prop is damaged more than is visable or it actually doesn't have the correct prop on it.
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Old 06-27-2012, 08:57 PM   #10
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Nice to meet you, bleak. I am in the same boat as you (Ha Ha) in that I too am a new owner and still learning my machine. I have a 2002 2300 SC with the 5.0L 220 hp Alpha 1 and also 170 hrs. I keep mine on Vancouver Island and have only driven it once for a couple of hours. The prop is a beat up Mercury 19" Pitch. I used it that one time only for reference as my first purchase was to be a new prop (I never run damaged props). I was surprised I got 41 mph GPS at 4600 rpm on this prop. I had three people on board, full tanks and all the gear I will ever carry. I have no trim tabs or ventilation plates. So that should serve as a reference for you.

Despite the dealer telling me otherwise during his pre delivery test run, I found the holeshot to be acceptable and low planing speeds to be good. He advised switching to a 4 blade prop.

I did however notice a few things I wasn't happy with and perhaps others could weigh in on this briefly (I think it is in line with this thread):
The trim is VERY narrow range of operation. Three seconds on the button and I am at trailering position. Is this normal? My outboard takes closer to 10-12 seconds to travel the full range.
The Faria trim gauge jumps all over the place during trimming and takes a second to settle after releasing the button (anyone else observe this? Where is the sensor?) and,
the prop ventilates VERY easily.

I've recently ordered a set of Piranha composite props in 18" and 20" 4-blade configuration. I've used these on my outboard and everyone Ive known who owns Piranhas thinks they are better than aluminum.

I've also ordered the Smart Tabs SX series model 90 for the boat. Going to wait a bit to see how the new prop works and will add them later but TOO many have said these puppies are a Gawd-send, (they cost less than half a tank of fuel so why not?). I use a Doel-Fin on my 17' outboard and think the same of it. I may even try it on the Maxum. Will let you know how all these turn out on the water.
MajBach
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