Outboard Bracket

[pgenesta]

Morning to all...
I have a 1977 O'Day 27 Sloop and I'm in the process of installing a Yamaha 9.9 hp 4 stroke on the transom. I do have a donated outboard bracket and need specs for proper installation.

 

[HukilauMike]

Where to begin? What exactly do you need "specs" for? Thickness of transom wall for adequate support? Size/angle of mounting block? Adequacy of bracket to support engine? Length of attachment bolts? Location of bracket on transom? If you can be more specific about what you are looking for, you will get better answers.

 

[fastscot]

Very important to identify the design capacity of the bracket. When I took over my 23' I replaced the bracket with a new Garelick one that indicated it was designed for the heavy weight of my 9.9 Honda. After I bought and installed it, I discovered that Garelick designates a much heavier duty bracket for 4 cycle engines because of their high torque. Not wanting to drop $ 3,000 to the bottom of the Chesapeake, last year I brought the correct bracket and installed it. There is a big difference if construction and cost in the two brackets.

 

[genesta]

Thanks for the response guys.
The help I need is in determining where on the transom should the bracket be mounted. Is there a formula to use for this application? Do I use a combination of length of shaft to determine the height of location for the bracket?

Where to begin? What exactly do you need "specs" for? Thickness of transom wall for adequate support? Size/angle of mounting block? Adequacy of bracket to support engine? Length of attachment bolts? Location of bracket on transom? If you can be more specific about what you are looking for, you will get better answers.

 

[Joe11688]

Morning to all...
I have a 1977 O'Day 27 Sloop and I'm in the process of installing a Yamaha 9.9 hp 4 stroke on the transom. I do have a donated outboard bracket and need specs for proper installation.

I take it that you are converting from an inboard sail drive engine or inboard gas 2 stroke to an outboard, right? You should install a block of some kind on the transom of this boat. I would also check the thickness of the transom or use a good size piece of marine plywood on the inside of the transom for reinforcement. The bracket should be heavy duty for this 4 stroke engine. A donated bracket is probably not strong enough for the torque and weight of the engine. I would go with the Garlelick bracket. It's a little pricey, but you'll get all the info needed for engine height. Here's a picture of a block on the transom of a 1986 O'Day 272. The block allows for the needed area to tilt the engine on the bracket.
Joe

 

[kdnichols]

I replaced my bracket last July with a new Garlelick one....built for 4 stroke outboards. I have a new small 6Hp Tohatsu.

The problem was the existing "block" on some O'day's that Joe refers to doesn't up with the larger bracket face of the Garlelick. So somebody on this forum gave me a PDF CAD drawing of a bracket.

I took the PDF to a local machine shop and they built me a stainless steel bracket adapter that "meshes" the old O'day block on the boat with the new Garleclick. I think it costs me about $85.

I had no problems with it and actually installed the bracket and motor by myself with no extra help.

Instead of using marine plywood for the backing inside the transom, I used a piece of that "plastic" marine board that will never rot, etc.

Let me know if you want that PDF....I know I've got it somewhere on my laptop.

I'm going sailing Friday...I'll take a few closeup photos of the bracket, etc.

Kevin

 

[genesta]

Any help would be appretiated. Thank you Kevin

I replaced my bracket last July with a new Garlelick one....built for 4 stroke outboards. I have a new small 6Hp Tohatsu.

The problem was the existing "block" on some O'day's that Joe refers to doesn't up with the larger bracket face of the Garlelick. So somebody on this forum gave me a PDF CAD drawing of a bracket.

I took the PDF to a local machine shop and they built me a stainless steel bracket adapter that "meshes" the old O'day block on the boat with the new Garleclick. I think it costs me about $85.

I had no problems with it and actually installed the bracket and motor by myself with no extra help.

Instead of using marine plywood for the backing inside the transom, I used a piece of that "plastic" marine board that will never rot, etc.

Let me know if you want that PDF....I know I've got it somewhere on my laptop.

I'm going sailing Friday...I'll take a few closeup photos of the bracket, etc.

Kevin

 

[emergpa1]

it sounds like you are looking for a "where" to mount the bracket? I have an oday 26 with an outboard nissan 2 stroke (love it). Let me take a picture of the inside and outside of the transome and download that. and i will include some measurements of how far up from the waterline. Mine is mounted on the port side of the transome, but I have seen photos of some on the starboard side.
I will go outside and take some pix now.
keith

 

[emergpa1]

Thanks for the response guys.
The help I need is in determining where on the transom should the bracket be mounted. Is there a formula to use for this application? Do I use a combination of length of shaft to determine the height of location for the bracket?

The top of my bracket is mounted 13 inches from the top of the rubrail.
The center of the bracket is mounted 15 inches to port from the center of the boat.
Note that you can't mount the bracket directly onto the transome, it has to be mounted on a wedge block to angle it correctly. There was a thread/discussion last week in this forum about the mold for the wedge block. Joe probably remembers which thread it was. I haven't had any sleep so i don't recall...Joe?
hope this helps
keith
The third picture is from the inside of the boat

 

[emergpa1]

BTW, regarding four stroke vs two stroke, i don't think the added torque of a four stroke is worth the additional weight, or cost over a two stroke. Being and ex-trail-biker, the old two stroke is hard to kill.
just my opinion
keith

 

[emergpa1]

two stroke vs four..continued...
Given the small amount of time the engine is actually used, why pay xtra for a four stroke, with their added weight and complexity, and their heavier mounting bracket requirements, when one only runs the thing about 5 % of the time the boat is underway?

 

[emergpa1]

besides, a damn four stroke doesn't smell right, long live the two-stroke....

 

[kdnichols]

Here is a link to the "Outboard Bracket Mounting Plate" PDF I mentioned. Basically, it's the go between for the old O'day wedge on the transom and the new Garlick bracket.

http://www.box.net/shared/yj4ahmxtkk

I'll take some photos Friday.

Kevin

 

[emergpa1]

cmon, this is an argument, a point of contention...are there no takers?

 

[RichBone]

The only advantage of a two stroke was the weight.
I don't think anybody is making a two stroke over 6hp anymore.
Rich

 

[emergpa1]

The only advantage of a two stroke was the weight.
I don't anybody is making a two stroke over 6hp anymore.
Rich

Hi rich, good to hear from you.
I haven't paid much attention to technical specifications about either type of engine except when doing some consumer research before buying a heavy duty leaf blower a couple of years ago. I ended up buying an echo 2-stroke which has been great. I currently fire up a 9.9Hp Nissan 2stroke on "my girl" when i need fossil fuel propulsion. all i can say is they are cheap and strong and start with a single pull or two every time. Also light as a feather. No problems at all.
As far as a power on a two stroke. I can comment on use with a trail bike: I NEVER had one to stall, even on some really steep inclines. I did foul a few plugs until i learned to turn off the fuel and let-R -run until the engine dies.
Have a great independence day Rich.
Keith

 

[genesta]

Thank You!!!!!!!!!

here Is A Link To The "outboard Bracket Mounting Plate" Pdf I Mentioned. Basically, It's The Go Between For The Old O'day Wedge On The Transom And The New Garlick Bracket.

http://www.box.net/shared/yj4ahmxtkk

I'll Take Some Photos Friday.

Kevin

 

[kdnichols]

Here are the photos of my Garelick bracket and bracket adapter.

Please note that the nick out of the Garelick bracket is from an unfortunate mast accident in April. The mast fell over the stern while moored in a bad storm.

It was a good windy day yesterday!

I hadn't had windy days in a long time and unfortunately had the boat 20 to 25 degrees over one time. I thought it would round up into the wind, but didn't! At one time, I thought we were going to fall out.

And me being an idiot, forgot about letting out the main sheet to get the heeling under control. (2nd year sailing). Fun times. Good thing my wife and kids weren't there....just my 17 yr old nephew. He was surprised.

Kevin

 

[Joe11688]

Here are the photos of my Garelick bracket and bracket adapter.

Please note that the nick out of the Garelick bracket is from an unfortunate mast accident in April. The mast fell over the stern while moored in a bad storm.

It was a good windy day yesterday!

I hadn't had windy days in a long time and unfortunately had the boat 20 to 25 degrees over one time. I thought it would round up into the wind, but didn't! At one time, I thought we were going to fall out.

And me being an idiot, forgot about letting out the main sheet to get the heeling under control. (2nd year sailing). Fun times. Good thing my wife and kids weren't there....just my 17 yr old nephew. He was surprised.

Kevin

That bracket looks good Kevin. That plate is definitely the way to go. I can't see changing a block if you don't have to. All you have to do is remember to head up into the wind in a strong puff. I took a friend of mine out on my boat on an extremely puffy day last year. The wind would lull, then it would come up from another direction with a strong blast and like to capsize my boat. At one point, some of my gear flew off the shelves down in the cabin and was all over the floor. My friend kept saying, "This is the kind of wind that I love to sail in!" I thought to myself, "This guy's a nut!" "Anyone with the brains that God gave a chipmonk wouldn't be out sailing in this!" We found a small protected cove and anchored for a while. It was close to noon time so I cooked up some grub for the both of us. Later on, I up anchored and headed back to the club under power.