Reply
 
Thread Tools Search this Thread Display Modes
 
Old 06-29-2014, 06:01 PM   #1
Ensign
 
Join Date: Jun 2014
Posts: 7
Default Cant keep my boat level port to starboard when plane

my boat is a 2000 Maxum 2800 SCR with twin 4.3 B2 with 3 blade alu props.
When i get the boat on plane I have a hard time trimming the trim tabs to keep the boat level on side. It tilts very easy from side to side. I consider myself as a experiend driver and I know how to do good trimming with both trim tabs and the drives. Last year I installed a Bennett trim computer to see if it would do the work for me as I need to have my hand on the trim tabs all the time to correct the boat. It is helping but its still a uncomfortable ride as it keep on adjusting.
Everything under the boat seems fine and trim tabs is working probably. The more people in the boat the worser it is?

Thanks Finn, Denmark
__________________

fbhvelocity is offline   Reply With Quote
Old 06-29-2014, 11:21 PM   #2
Admiral
 
mmwjr's Avatar
 
Join Date: Feb 2012
Location: Perry Hall, Maryland
Posts: 5,468
Default

Finn welcome aboard.

Are the tabs from Bennett? Maxum used Boat Leveler on a lot of it's boats.
Are folks moving around a lot which will keep throwing the trim off?
Small adjustments at a time and wait to see how the boat reacts.
Wind and current will impact trim.
Have you tried trimming the drives as well?

Are the drives set up for counter rotating? Props same diameter and pitch?
__________________

__________________
Mike
mmwjr is offline   Reply With Quote
Old 06-30-2014, 08:06 AM   #3
Ensign
 
Join Date: Jun 2014
Posts: 7
Default

Quote:
Originally Posted by mmwjr View Post
Finn welcome aboard.

Are the tabs from Bennett? Maxum used Boat Leveler on a lot of it's boats.
Are folks moving around a lot which will keep throwing the trim off?
Small adjustments at a time and wait to see how the boat reacts.
Wind and current will impact trim.
Have you tried trimming the drives as well?

Are the drives set up for counter rotating? Props same diameter and pitch?

-Tabs are from Bennett and came with the boat from factory.
-Boat is VERY sensitive if folks are moving around
-Small adjustments, YES but the boat still tilt over alot
-Wind and current...I know but boat act way more sensitive than you would expect.
-Trimming the drives help and I use them all the times however it seems like the boat like the drives to be trimmed as far Down as they can.

Drives are setup with counter rotation and props are from factory 18 X 19"

What I do is getting the boat on plane with the tabs and drives Down position. When its on plane lets say 22 Knots I trim the tabs up until I get the fastest speed I can get (Minimum Drag from the tabs) With the level computer ON it correct small amount at the time but stil the boat goes slowly from one side to the other.
Totally flat Water and zero Wind is the same.

I talked to other 2800SCR owners but they cannot reconice this. They have single engine installation througt.
fbhvelocity is offline   Reply With Quote
Old 06-30-2014, 12:50 PM   #4
Admiral
 
mmwjr's Avatar
 
Join Date: Feb 2012
Location: Perry Hall, Maryland
Posts: 5,468
Default

Going to have to see what other 2800 owners with twins have to say, hopefully they will chime in soon.
__________________
Mike
mmwjr is offline   Reply With Quote
Old 06-30-2014, 03:25 PM   #5
Captain
 
Phillbo's Avatar
 
Join Date: Mar 2012
Location: Arizona
Posts: 861
Default

How does it act with the computer turned off? Can you trim it manually?
Phillbo is offline   Reply With Quote
Old 06-30-2014, 04:02 PM   #6
Moderator

 
Join Date: Apr 2008
Posts: 3,616
Default

Trim the drives out more. If you are running with the drives all the way in then the boat will tend to lay onto one side or the other. Trim the drives out to get back to the planing portion of the hull.
__________________
Shhhhhh!!! Please lower your voice, the boat is sleeping.
shrew is offline   Reply With Quote
Old 07-01-2014, 10:29 AM   #7
Ensign
 
Join Date: Jun 2014
Posts: 7
Default

I can trim manually but I need my hand on the dash to control the all the time. It was the reason I installed the computer last year.

I will try trim the drives out more and see what happens. I run twin V6 190 HP and cruise 21-22 Knots with about 36-3800 RPM. This is the lowest speed I can cruise with the feeling that the boat is 100% planing. Any believe that stainless steel props will help on this?
fbhvelocity is offline   Reply With Quote
Old 07-01-2014, 11:25 AM   #8
Lt. JG
 
Join Date: Nov 2013
Location: NY
Posts: 28
Default

I have a 98 2800 scr ,with twin v6's ,always start with trim tabs all the way up and slowly adjust when on plane to level boat. On mine very small adjust needed to level. Mine cruises at 3100RPM's. Your tabs are putting to much drag on the boat.
Lawnman is offline   Reply With Quote
Old 07-01-2014, 11:41 AM   #9
Ensign
 
Join Date: Jun 2014
Posts: 7
Default

Ok Seems like something is amiss with the high RPM I Run. What prop pich do you run? Mine is 18-1/4 x 19" alu. WOT is 4600RPM. I think I read somewhere that the 4bbl V6 turn 18-1/4 x21" ? It would be nice if I could get cruising RPM Down. Do you know your GPS speed at 3100 RPM?

Normally I use the tabs full Down to get on plane then I trim them all way up and adjust from there. It might be the combination with full Down drives that makes it tilt over side.

Thanks
fbhvelocity is offline   Reply With Quote
Old 07-01-2014, 02:46 PM   #10
Captain
 
Phillbo's Avatar
 
Join Date: Mar 2012
Location: Arizona
Posts: 861
Default

Sounds like you are experiencing what I call Bow Plow... get the bow up.
__________________

Phillbo 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 01:04 PM.


Powered by vBulletin® Version 3.8.8 Beta 4
Copyright ©2000 - 2017, vBulletin Solutions, Inc.