Reply
 
Thread Tools Search this Thread Display Modes
 
Old 06-20-2012, 11:46 AM   #1
Ensign
 
Join Date: Jun 2012
Posts: 3
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?
__________________

beyondbleak is offline   Reply With Quote
Old 06-20-2012, 01:47 PM   #2
Admiral

 
ss3964spd's Avatar
 
Join Date: Jul 2009
Location: Fairfax Va
Posts: 1,512
Send a message via Yahoo to ss3964spd
Default

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.

Dan
__________________

ss3964spd is offline   Reply With Quote
Old 06-20-2012, 03:46 PM   #3
Admiral

 
seapuppy's Avatar
 
Join Date: Nov 2005
Location: Everett Wa
Posts: 4,681
Default

BB.
Welcome to the zoo.......



SP
__________________
Don't compare your life to others. You have no idea what their journey is all about.
------------------------
SSN683 Association member
Par Excellence
------------------------------
2008 Bayliner 340 - "Wild Whim"
--------------------------------------
I live in my own little world....but it's okay-they know me here!!!

Avid practitioner of the martial art: KLIK-PAO.
Tap-Rack-Bang

Anyone that sez "Size doesn't matter" has never owned a boat!
seapuppy is offline   Reply With Quote
Old 06-20-2012, 06:39 PM   #4
Captain
 
pascavone's Avatar
 
Join Date: Nov 2010
Location: Massapequa, New York, United States
Posts: 762
Default

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.
pascavone is offline   Reply With Quote
Old 06-21-2012, 07:31 PM   #5
Lt. JG
 
Whiskey River's Avatar
 
Join Date: Jul 2009
Location: Chapel Hill, NC
Posts: 44
Default

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.
Whiskey River is offline   Reply With Quote
Old 06-22-2012, 01:02 AM   #6
Ensign
 
Join Date: Jun 2012
Posts: 3
Default

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
beyondbleak is offline   Reply With Quote
Old 06-22-2012, 02:02 PM   #7
Moderator

 
Join Date: Apr 2008
Posts: 5,002
Default

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.
shrew is offline   Reply With Quote
Old 06-22-2012, 03:19 PM   #8
Lieutenant
 
Join Date: Oct 2010
Location: Baltimore, MD
Posts: 95
Default

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.
__________________
2001 Maxum 2300SC/5.7(250HP) Mercruiser Alpha One Gen 2
Jerryh3 is offline   Reply With Quote
Old 06-22-2012, 04:06 PM   #9
Admiral

 
ss3964spd's Avatar
 
Join Date: Jul 2009
Location: Fairfax Va
Posts: 1,512
Send a message via Yahoo to ss3964spd
Default

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.
ss3964spd is offline   Reply With Quote
Old 06-27-2012, 07:57 PM   #10
Lt. JG
 
Join Date: Jun 2012
Posts: 16
Default

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
majbach is offline   Reply With Quote
Old 06-27-2012, 08:32 PM   #11
Commander
 
Join Date: Aug 2010
Location: Purcellville, VA.
Posts: 296
Default

Quote:
Originally Posted by majbach View Post
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?)
That does not seem right, that is for sure. Have you tested this with motor off? Can you confirm that it is really going from Full Down to Full Up in only 3 seconds or could it be just the guage reading Full Up when outdrive is not really up?
So basically there are 2 trim senders on the outdrive. The Starboard side switch is the Trim Sender. This is what operates the guage and tells it how high the outdrive is. Generally this is adjusted to read dead on the Down line when Full Down. The Port side switch is the Trim Limit switch. This is the switch that kills the trim motor once you have reached partial Up. There is an adjustment for this where you measure from trim cylinder pins until you get it to be 20-3/4 inches (this is for my year A1G2 though). This limits the Trim to this range and you must use Trailer to get it Full Up.

Now if you really are going from Full Down to Full Up that fast, I would guess there is an issue on the trim pump or something. Never really played with this much but it is just a motor drive hydraulic pump with pressure relief valves and such. Maybe one has failed and is producing too much pressure causing it to extend the trim cylinders fully in seconds.

As far as the guage bouncing around, that could be a faultty guauge or a sign of the Trim Sender going bad. They are known for the wires falling apart right at the unit so inspect that if you can. I used Liquid Electrical tape on mine to seal them up and buy a bit more time on them. These are just simple variable voltage devices and you can monitor it with a meter if you have one. The Voltage reading should change smoothly as you trim up and down. If you see it going all over the place, it is probably bad.
mcoffey is offline   Reply With Quote
Old 06-28-2012, 01:41 AM   #12
Lieutenant
 
Join Date: Jun 2012
Location: Chain O' Lakes, IL
Posts: 99
Default

I have the Smart Tab II (1610) set-up on our 2400 SC3 (cuddy). IMO, they work, but are a PITA. The boots leak and then the struts go bad. The boat starts to really list and you have to pull it to see whats going on. After purchasing a set 4 replacements, I wished I had gone with electric trim tabs where you can adjust for load, especially while running under the night time 25 mph speed limit. I also didn't like the short bolts and limited number of nuts and washers they gave me. Again, JMO. I know a guy with a 21' open bow who really loves them, but I doubt he runs with the majority of the load in the rear of boat.
AlwaysSober is offline   Reply With Quote
Old 06-28-2012, 04:06 AM   #13
Lt. JG
 
Join Date: Jun 2012
Posts: 16
Default

Quote:
Originally Posted by mcoffey View Post
That does not seem right, that is for sure. Have you tested this with motor off? Can you confirm that it is really going from Full Down to Full Up in only 3 seconds or could it be just the guage reading Full Up when outdrive is not really up?
<snip>
Thanks. I'll look into this and get back to ya so I don't steal this thread.
majbach is offline   Reply With Quote
Old 06-28-2012, 01:07 PM   #14
Admiral

 
ss3964spd's Avatar
 
Join Date: Jul 2009
Location: Fairfax Va
Posts: 1,512
Send a message via Yahoo to ss3964spd
Default

Quote:
Originally Posted by AlwaysSober View Post
I wished I had gone with electric trim tabs where you can adjust for load, especially while running under the night time 25 mph speed limit.
I used Bennett tabs on my SC3, probably the most useful improvement I've made to the boat, followed closely by the magnet that keeps the transom idoor n the open position without banging.

Dan
ss3964spd is offline   Reply With Quote
Old 06-30-2012, 04:07 PM   #15
Lieutenant
 
Join Date: Jun 2012
Location: Chain O' Lakes, IL
Posts: 99
Default

Quote:
Originally Posted by ss3964spd View Post
I used Bennett tabs on my SC3, probably the most useful improvement I've made to the boat, followed closely by the magnet that keeps the transom idoor n the open position without banging.

Dan
Magnets? Dooh! 6 1/2 seasons of "Shut the damn door!" when I could have been in boating bliss?

Thanks for the heads up Dan. If Big Max doesn't drain my bank account this season, I'll get real tab actuators put on lil max this winter.
AlwaysSober is offline   Reply With Quote
Old 07-07-2012, 02:41 PM   #16
Ensign
 
Join Date: Jun 2012
Posts: 3
Default

I now have over 20 hours out on Lake erie with the new boat. I have added a few features, Lenco 12x12 trim tabs with Led read out (absolutely night and day in the hole shot and a godsend when considering how shallowing some of the western lake erie parts are. The boat has been fully serviced and gone over by my local marina and all parts replaced that was needed (not fun on the pocket book). I pulled the boat at the end of this week to figure out the propeller options, my local repair shop wants $90 plus tax to repair my 16 x 19 3 blade aluminum prop, seems a waste to me since I would like to find a better prop. My prop shop told me to go to a 4 blade, but I was concerned with the loss in overall speed since after tabs I can acheive 36mph at 4300rpm. Any ideas?
beyondbleak is offline   Reply With Quote
Old 07-07-2012, 03:00 PM   #17
Commander
 
Join Date: Mar 2010
Location: Southern Maine
Posts: 289
Default

Bleak,
As an engineer the prop question has baffled and frustrated me since getting a boat. I want there to be an equation, chart, or tool to tell me what prop is the best for my boat. Unfortunately that is not the case. From all the research I have done, you can use the mercury prop selection tool to try and determine the best prop, but that will really only be a starting point. Because every boat is different (loading, hull shape, tabs/no tabs, weight distribution, planned use) the bottom line is it's a preference thing and the only real way to figure out the right prop is find a good shop that will let you try a couple different ones out.

Good Luck.

-JP
CountryME is offline   Reply With Quote
Old 07-29-2012, 12:39 PM   #18
Ensign
 
Join Date: Feb 2011
Posts: 6
Default

beyond,

I have the exact same boat with the exact same set up. Lenco tabs installed this year.

Difference is amazing with and with out tabs. After putting them on, there is now way this boat should be ever be run without tabs. Even my wife notices the difference riding as a passenger.

I can hit 45 mph on a clear day, but rarely do i ever run that fast, the ocean is usually too choppy.


I have an aluminum 3 blade 19p prop. Was thinking of going to something similar in stainless steel. Let me know what you end up with and how you like it.
Gfriedm1 is offline   Reply With Quote
Old 07-31-2012, 10:23 PM   #19
Ensign
 
Join Date: Jul 2012
Posts: 6
Default

I have a 1996 not the gen 2 BUT sounds just like a heated conversation I had with the salesman that promised me the boat would do mid 40s. I traded a 19 ft bayliner 5.0 4 barrel 50-55 mph so i was used to it and really talked about speed when picking this out. Long story short we split the cost of a steeper pitch stainless prop now I can 45 on a good day but always over 40 and no tabs needed at all.
__________________

THEGPW is offline   Reply With Quote
Reply

Thread Tools Search this Thread
Search this Thread:

Advanced Search
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off


Powered by vBadvanced CMPS v3.2.3

All times are GMT. The time now is 05:27 PM.


Powered by vBulletin® Version 3.8.8 Beta 4
Copyright ©2000 - 2021, vBulletin Solutions, Inc.