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Author Topic:   trim tabs for tender

footsie posted 03-08-2007 02:09 PM ET (US)
What benefits would I get from mounting trim tabs on the stern of a Tender? What are the disadvantages? Any real world experience would be appreciated.......
towboater posted 03-09-2007 03:06 PM ET (US)
Advantages: Tabs will help stabilize ANY boat underway.
Disadvantages: If it aint broke, dont fix it. Tabs may be expensive unnessessary if not frivolous additions to a tender. Install of electric/hydraulic tabs could run around $1200 & require holes drilled into the hull below the waterline. If not done correct, you can be certain it will devalue the boat. Collisions with piles, backing into docks or even another boat could damage the tabs/hull and whatever they run into far more than the same collision without tabs.
Does the eng have power tilt? If not, I would think a better investment would be a engine that does.
footsie posted 03-09-2007 04:34 PM ET (US)
No power t/t on engine. I was thinking of a simple,mechanical setable angle tab or a "smart" one with shocks for $100.
towboater posted 03-09-2007 08:39 PM ET (US)
I s'pose you could cobble together manual adjusting tabs using ss strap hinges, alum plate, turnbuckles & fasteners around $100. sigh.
Try adjusting manual engine tilt & mess around in all positions before you start drilling holes in the transom.
In 1966 I would manually adjust a 65 hp merc (or was it a 50?) up or down almost every single time we ran it depending on what we were doing. I think that was my first boat job. If I was alone, the engine was raised to the top hole. (Glaspar G-3).
Towing Mr Bill T Slalom, I needed to drop it 3 holes.
4 passengers, 4 holes.
When I was younger, I could remember everything, whether it happened or not.
M Twain

where2 posted 03-10-2007 12:24 AM ET (US)
Technically, you don't have to "cobble something together". You could pull out the credit card and purchase the Trim Tabs on page 17 of the 2007 St. Croix Marine Products catalog. They offer them in 3"x8" and 6"x8". They are works of art when you get your hands on them.
http://www.davit.com/07catalog4PDF.pdf
Royboy posted 03-10-2007 09:05 AM ET (US)
These work well too. I have them on a 17 Outrage.
http://www.nauticusinc.com/
Roy
towboater posted 03-10-2007 01:39 PM ET (US)
"Technically" ;-), footsie asked what he could do with a $100 budget.
Roys link lists 12x9 tabs with actuator for $229.
thx Roy.
Id bet this is what you want footsie.
good luck.
mk
footsie posted 03-10-2007 05:16 PM ET (US)
Thanks guys. Actually I have tilted and lifted considerable since mounting the Yamaha 2 stroke 15 hp on this tender and I can only eliminate bow hop by tilting way under and plowing more than I want to.
I have been looking at the smart tabs as well as adjustable step and trim tabs as possible solutions. I would mount them on the upper flats on each side of the hull.
Towboater, we must share some of the same experiences. I used to jerk around a tall 80hp Merc on the transome of a G-3. Top speed and severe degrading of control resulted from the top tilt pin hole. It was spectacular to watch and invigorating to drive........My first, boat job, however, was a 10' PY Swift with a Super Huricane....But that was then and this is now......
towboater posted 03-11-2007 12:35 AM ET (US)
Damn you footsie, dont get me goin...
first skipper job I can remember,
7 maybe 8 years old.
yes, 7.
16 ft wooden Pacific with 40 horse Homelite just had the anchor laying on the beach tied to the bow.
Smith River Oregon. Folks are drinkin and carrying on back up at camp.
I noticed the river was raising (tide) and with my 5 yr old sister on board, instead of alerting the Folks, I gently pushed the boat out and went drifting.
Drifting along, I remember pushing the boat AWAY from tree branches along the shoreline instead of holding on to them. Lil sister was fine.
I dont know, maybe 15 mins, maybe 30, seemed like a long time before they noticed the boat, Kristi and I were gone. LOL. I guess they had a fire drill for awhile.
One thing I can prove, we went far enough that the rescue boat was pulling us back WOT and we can be seen smiling and waving to the 8mm Kodak camera as we did a tandem fly-by. Some day I am gonna put that film on disk.
mk

towboater posted 03-11-2007 12:38 AM ET (US)
correction,
the engine was a 40 horse Scott.
yeah, i guess that dates me.
Now I expect you to tell me you drag the tender behind a 60 ft Hat.
mk
footsie posted 03-11-2007 12:19 PM ET (US)
Touché Towboater. At 7/8 years, my dad had me row while he fished. At 12 yo, I purchased a 6 hp Martin so I could fish with one hand. Dad did not believe in motors. At 15 yo, I got my beloved Swift and powered it with Mk25, Merc400, and Mk 55 over the years. I helped a friend mount a 50 hp Mercury on one of the first 13' Whalers in Maine and after a summer of jacking, propping and modifying got 50 mph out of it when we could keep it upright. Wish I remembered how we did th
Royboy posted 03-11-2007 06:35 PM ET (US)
Check the price again on a suitably sized pair of Smart Tabs for a tender. They are $120 to $130 plus shipping, depending on steel or composite tabs. See the link below and the list price for ST780-20, or ST781-20.
http://www.nauticusinc.com/price_list.htm
I guess I assumed he (and anyone else looking) would be astute enough to pick the right size for a tender. While still over the $100 threshhold, they would likely be the ticket to stabilize a tender. The $229 model is for a much larger and more powerful boat, like my 17 Outrage II with a 135 Optimax.
Roy
footsie posted 03-14-2007 10:14 AM ET (US)
Well, I just purchased a new set of Nauticus Smart Tabs on E-Bay for $75.00 freight included. I will try them as well as jacking the motor another .5" up.
Where can I get a cupped ss prop 9.25" X 12 pitch to fit my Yamaha 15?
footsie posted 03-14-2007 06:16 PM ET (US)
Well, I jacked the motor up to 1" over the transom and the bow hopping increased. Contrary to advice on this forum, raising the motor increases the problem! The motor is in the bottom tilt pin hole and the motor is shimmed out at the top of the transom to increase tuck under. I am wondering if the hull has a rocker effect in the bottom.........There is no bow hopping at mid throttle. It starts and increases as full throttle is applied........???????
jgkmmoore posted 03-14-2007 07:11 PM ET (US)
Bag o' sand in the pointy end bro.........
towboater posted 03-14-2007 07:25 PM ET (US)
You've got two threads goin here footsie, here is a direct quote copied from my post on the other thread.
"I wonder if dropping it DOWN a hole or two on the transom would give you more bite on the wheel and fin to pull the bow down and this might give you another notch of tilt if needed."
Sorry you missed it or misinterpreded.
Wish I was there to help ya.
Try to drop it DOWN a hole or two again.
If that doesnt work, you might need to set the engine back a little to get more tilt. more on that if needed.
I know that 15 will plane that boat, you are not far off.
Be patient.
What you are doing with that tender is not much different than mounting a 200 on a 18 & this site is loaded with performance threads that can only be dialed in by experimenting with sea trials & posting the results.
mk

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Author	Topic: trim tabs for tender
footsie	posted 03-08-2007 02:09 PM ET (US) What benefits would I get from mounting trim tabs on the stern of a Tender? What are the disadvantages? Any real world experience would be appreciated.......
towboater	posted 03-09-2007 03:06 PM ET (US) Advantages: Tabs will help stabilize ANY boat underway. Disadvantages: If it aint broke, dont fix it. Tabs may be expensive unnessessary if not frivolous additions to a tender. Install of electric/hydraulic tabs could run around $1200 & require holes drilled into the hull below the waterline. If not done correct, you can be certain it will devalue the boat. Collisions with piles, backing into docks or even another boat could damage the tabs/hull and whatever they run into far more than the same collision without tabs. Does the eng have power tilt? If not, I would think a better investment would be a engine that does.
footsie	posted 03-09-2007 04:34 PM ET (US) No power t/t on engine. I was thinking of a simple,mechanical setable angle tab or a "smart" one with shocks for $100.
towboater	posted 03-09-2007 08:39 PM ET (US) I s'pose you could cobble together manual adjusting tabs using ss strap hinges, alum plate, turnbuckles & fasteners around $100. sigh. Try adjusting manual engine tilt & mess around in all positions before you start drilling holes in the transom. In 1966 I would manually adjust a 65 hp merc (or was it a 50?) up or down almost every single time we ran it depending on what we were doing. I think that was my first boat job. If I was alone, the engine was raised to the top hole. (Glaspar G-3). Towing Mr Bill T Slalom, I needed to drop it 3 holes. 4 passengers, 4 holes. When I was younger, I could remember everything, whether it happened or not. M Twain
where2	posted 03-10-2007 12:24 AM ET (US) Technically, you don't have to "cobble something together". You could pull out the credit card and purchase the Trim Tabs on page 17 of the 2007 St. Croix Marine Products catalog. They offer them in 3"x8" and 6"x8". They are works of art when you get your hands on them. http://www.davit.com/07catalog4PDF.pdf
Royboy	posted 03-10-2007 09:05 AM ET (US) These work well too. I have them on a 17 Outrage. http://www.nauticusinc.com/ Roy
towboater	posted 03-10-2007 01:39 PM ET (US) "Technically" ;-), footsie asked what he could do with a $100 budget. Roys link lists 12x9 tabs with actuator for $229. thx Roy. Id bet this is what you want footsie. good luck. mk
footsie	posted 03-10-2007 05:16 PM ET (US) Thanks guys. Actually I have tilted and lifted considerable since mounting the Yamaha 2 stroke 15 hp on this tender and I can only eliminate bow hop by tilting way under and plowing more than I want to. I have been looking at the smart tabs as well as adjustable step and trim tabs as possible solutions. I would mount them on the upper flats on each side of the hull. Towboater, we must share some of the same experiences. I used to jerk around a tall 80hp Merc on the transome of a G-3. Top speed and severe degrading of control resulted from the top tilt pin hole. It was spectacular to watch and invigorating to drive........My first, boat job, however, was a 10' PY Swift with a Super Huricane....But that was then and this is now......
towboater	posted 03-11-2007 12:35 AM ET (US) Damn you footsie, dont get me goin... first skipper job I can remember, 7 maybe 8 years old. yes, 7. 16 ft wooden Pacific with 40 horse Homelite just had the anchor laying on the beach tied to the bow. Smith River Oregon. Folks are drinkin and carrying on back up at camp. I noticed the river was raising (tide) and with my 5 yr old sister on board, instead of alerting the Folks, I gently pushed the boat out and went drifting. Drifting along, I remember pushing the boat AWAY from tree branches along the shoreline instead of holding on to them. Lil sister was fine. I dont know, maybe 15 mins, maybe 30, seemed like a long time before they noticed the boat, Kristi and I were gone. LOL. I guess they had a fire drill for awhile. One thing I can prove, we went far enough that the rescue boat was pulling us back WOT and we can be seen smiling and waving to the 8mm Kodak camera as we did a tandem fly-by. Some day I am gonna put that film on disk. mk
towboater	posted 03-11-2007 12:38 AM ET (US) correction, the engine was a 40 horse Scott. yeah, i guess that dates me. Now I expect you to tell me you drag the tender behind a 60 ft Hat. mk
footsie	posted 03-11-2007 12:19 PM ET (US) Touché Towboater. At 7/8 years, my dad had me row while he fished. At 12 yo, I purchased a 6 hp Martin so I could fish with one hand. Dad did not believe in motors. At 15 yo, I got my beloved Swift and powered it with Mk25, Merc400, and Mk 55 over the years. I helped a friend mount a 50 hp Mercury on one of the first 13' Whalers in Maine and after a summer of jacking, propping and modifying got 50 mph out of it when we could keep it upright. Wish I remembered how we did th
Royboy	posted 03-11-2007 06:35 PM ET (US) Check the price again on a suitably sized pair of Smart Tabs for a tender. They are $120 to $130 plus shipping, depending on steel or composite tabs. See the link below and the list price for ST780-20, or ST781-20. http://www.nauticusinc.com/price_list.htm I guess I assumed he (and anyone else looking) would be astute enough to pick the right size for a tender. While still over the $100 threshhold, they would likely be the ticket to stabilize a tender. The $229 model is for a much larger and more powerful boat, like my 17 Outrage II with a 135 Optimax. Roy
footsie	posted 03-14-2007 10:14 AM ET (US) Well, I just purchased a new set of Nauticus Smart Tabs on E-Bay for $75.00 freight included. I will try them as well as jacking the motor another .5" up. Where can I get a cupped ss prop 9.25" X 12 pitch to fit my Yamaha 15?
footsie	posted 03-14-2007 06:16 PM ET (US) Well, I jacked the motor up to 1" over the transom and the bow hopping increased. Contrary to advice on this forum, raising the motor increases the problem! The motor is in the bottom tilt pin hole and the motor is shimmed out at the top of the transom to increase tuck under. I am wondering if the hull has a rocker effect in the bottom.........There is no bow hopping at mid throttle. It starts and increases as full throttle is applied........???????
jgkmmoore	posted 03-14-2007 07:11 PM ET (US) Bag o' sand in the pointy end bro.........
towboater	posted 03-14-2007 07:25 PM ET (US) You've got two threads goin here footsie, here is a direct quote copied from my post on the other thread. "I wonder if dropping it DOWN a hole or two on the transom would give you more bite on the wheel and fin to pull the bow down and this might give you another notch of tilt if needed." Sorry you missed it or misinterpreded. Wish I was there to help ya. Try to drop it DOWN a hole or two again. If that doesnt work, you might need to set the engine back a little to get more tilt. more on that if needed. I know that 15 will plane that boat, you are not far off. Be patient. What you are doing with that tender is not much different than mounting a 200 on a 18 & this site is loaded with performance threads that can only be dialed in by experimenting with sea trials & posting the results. mk