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Carver
BoatUS Boat Groups/Manufacturer Forums>>Carver

Topic: Trim Tab Removal

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jarathehut
"Seaman Recruit"

Joined: September 25 2008
Posts: 3

Posted: September 25 2008 at 04:58 \| IP Logged

I recently purchased a 1976 Carver Monterey 33 with twin
351 Pleasurecrafts and Borg Warner Velvet Drives. This
boat came with "built into the hull" trim tabs. I have since
removed them due to rusted out screws.
Boat will not plane out. Mechanic says all systems are
perfect. Nothing wrong with fuel, electrical or mechanical.
Boat will not reach full rpms of around 4400. Instead I'm
only getting 2500 on the portside and 3000 on the
starboard engine.
Question? Could the reason the boat will not get up on
plane be to the simple fact that it has to have these built in
trim tabs in order to run properly?

__________________
Jerry N. Jara

glpowercruiser
"Seaman"

Joined: February 29 2008
Posts: 31

Posted: September 25 2008 at 11:41 \| IP Logged

Hi Jerry,

If that's all you changed and the rpm specs changed after tab removal, then I would say the trim tabs are the cause. I could see the lowered RPMs at WOT if the boat is not planing, but it could be other factors. Did you have spec WOT RPMs before removing the trim tabs? If so, go new trim tabs.

I have trim tabs on my boat and I can plane with then up, but it just takes longer to do so. Your hull is different than mine, so I can't say for sure, but I would think that it should plane without them. Trim tabs are not the only dynamic in performance. This and the difference between the engines could be due to linkage adjustment or prop, shaft, and strut issues.

I have a Carver 3207 with 270hp Crusaders and had the same problem with reaching full RPM @ WOT. My primary problem was in the props. Previous owner replaced both props after a foul with a chain. The replacements had same size and pitch, but a larger blade area than the originals, so held the water longer (more work for the engines) which lowered the WOT RPMs. I had the props scoped, tuned, and resized 1/2 inch shorter (total circumference) and that got me back on spec. I still had a difference between engines that went away with truing the lower RPM engine's prop shaft (slightly bent) and re-aligning both engines. Now I'm pretty close (maybe I'll fiddle with the linkage next).

If everything else is running well, props improperly sized or shaped, or props, shafts, or struts out of true could be culprets. And variation between the two sides on these factors can be the reason for RPM differences.

If they haven't been checked off the boat in a while, it might be best to have your props scoped by a good computerized analysis (just becaust it's time) and trued if needed this off season.

"It's always sumthin', ain't it?!!"

Ron Simpson

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glpowercruiser@msn.com
Carver 3207
"Pouting Girl"

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jarathehut
"Seaman Recruit"

Joined: September 25 2008
Posts: 3

Posted: September 26 2008 at 05:05 \| IP Logged

Props (16X16) are fresh from the shop. I contacted the
Carver Corporation about not being able to plane out.
Their reply was that it had to be the trim tabs. My boats
hull has divets/recesses formed into the hull where the
trim tabs go. They're heavy and massive. Carver say's
the boats not going to get on plane unless I reinstall the
trim tabs. If thats not an option, I was told to fill in/glass
in the original trim tab pockets and install after market
ones. I was also told that the RPMs are never going to
max out unless I get my stern out of the water. Thanks
for you input. I appreciate it.

__________________
Jerry N. Jara

tmmassari
"Seaman Recruit"

Joined: October 27 2008
Posts: 10

Posted: October 27 2008 at 18:09 \| IP Logged

Have you guys ever used trim tabs by nauticusinc.com

They have the st stainless steel plates and the new composite plastice sx series plates

on trimtabgirl.com they have the application page and information

No drilling needed and a full warranty back up

Out'nAbout
"Seaman Recruit"

Joined: May 14 2004
Posts: 23

Posted: October 27 2008 at 18:46 \| IP Logged

I'd urge you to repurchase Bennett Trim Tabs. No matter what happens they will back you up. I've had the entire tab (a 54 inch tab) get knocked off & I've received a full replacement. Even the shipping was free. Nobody is as strong with support as Bennett.

__________________
Lady M 2001
Carver 570 Voyager Pilothouse
USCG Lic Master

tmmassari
"Seaman Recruit"

Joined: October 27 2008
Posts: 10

Posted: October 27 2008 at 18:48 \| IP Logged

The smart trim tab is fully warranted also

If you go to trimtabgirl.com and see

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trimtabgirl.com

Out'nAbout
"Seaman Recruit"

Joined: May 14 2004
Posts: 23

Posted: October 27 2008 at 19:06 \| IP Logged

I'd rather buy a Bennett then another brand for free.

__________________
Lady M 2001
Carver 570 Voyager Pilothouse
USCG Lic Master

tmmassari
"Seaman Recruit"

Joined: October 27 2008
Posts: 10

Posted: October 27 2008 at 19:08 \| IP Logged

Isn't Bennet electric I am trying to get input on the plates composite to stainless steel .

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trimtabgirl.com

Out'nAbout
"Seaman Recruit"

Joined: May 14 2004
Posts: 23

Posted: October 27 2008 at 19:13 \| IP Logged

Bennett is also Stainless Steel

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Lady M 2001
Carver 570 Voyager Pilothouse
USCG Lic Master

jarathehut
"Seaman Recruit"

Joined: September 25 2008
Posts: 3

Posted: October 28 2008 at 13:07 \| IP Logged

I checked the trimtabgirl.com site. They only make trim
tabs for smaller boats. Nothing that covers over 30' or
over 8000lbs.

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Jerry N. Jara

tmmassari
"Seaman Recruit"

Joined: October 27 2008
Posts: 10

Posted: October 30 2008 at 12:03 \| IP Logged

They have the st 1610 180 trim tabs by nauticusinc.com on trimtabgirl.com for Day crusiers rescue boats cuddy cabin boats 23 foot to 30 foot 7000 min and 8500 max lbs. 299.99

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trimtabgirl.com

tmmassari
"Seaman Recruit"

Joined: October 27 2008
Posts: 10

Posted: March 27 2009 at 19:22 \| IP Logged

TRimtabgirl.com sells LARGE BOAT nauticus smart trim tabs in all sizes LARGE protrollers small boats and over 27 foot boats Right now they have 10.00 REBATE til July 2009 on all sx series and if you inquire they have factory blemishes for sale for 99.00 paid and you receive a link for the 10.00 rebate These are brand new with small blemishe son plastic plates you can email trimtabgirl@aol.com if you do not find the link for these new trim tabs with nauticus warranty sor sx 9520 40 sx 9520 60 and sx 9520 80 They do sell also the stailess steel plates and the STs series and the Mt series.. They will also try to beat your price

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trimtabgirl.com

tmmassari
"Seaman Recruit"

Joined: October 27 2008
Posts: 10

Posted: March 27 2009 at 19:24 \| IP Logged

TRIMTABGIRL.COM has factory blemish sx Series trim tabs for 99.00 with a link when paid for a 10.00 rebate on the purchase These are brand new with full warranty by nauticus.... Email them at trimtabgirl@aol.com if links are not available sx 9510 40 sx 9510 60 sx 9510 80 selling USA CANADA and international

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trimtabgirl.com

tmmassari
"Seaman Recruit"

Joined: October 27 2008
Posts: 10

Posted: March 27 2009 at 19:27 \| IP Logged

Quote: jarathehut

I checked the trimtabgirl.com site. They only make trim
tabs for smaller boats. Nothing that covers over 30' or
over 8000lbs.

They sell for large boats small boats bass boats and protroller boats all sizes trimtabgirl.com Composite and stainless steel see the video

tmmassari
"Seaman Recruit"

Joined: October 27 2008
Posts: 10

Posted: March 27 2009 at 19:29 \| IP Logged

TRIM TAB sx 9510 40 sx 9520 60 sx 9510 80 HAS 10.00 REBATE email on trimtabgirl.com or email trimtabgirl@aol.com and after purchase of sx series plates receive a link for 10.00 rebate also they are brand new with full warranty

__________________
trimtabgirl.com

tmmassari
"Seaman Recruit"

Joined: October 27 2008
Posts: 10

Posted: March 27 2009 at 19:31 \| IP Logged

TRIM TAB BRAND NEW full warranty with factory blemishes on composite plates sx series only minor selling for 99.00 with a link for 10.00 rebate after purchase email trimtabgirl@aol.com or go to site trimtabgirl.com and email full nauticus warranty smart trim tabs

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trimtabgirl.com

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