20 inch motor on a bracket

randlemanboater · #1 01-08-2007, 07:01 PM

Does anyone know how a 20 " shaft motor does on a bracket? It seems that most of the bracketed motors I see are 25"er's. I would think if you mount the bracket at the correct height that it would be fine, but I ain't that sharp on such topics. I'm just thinking for the future.

Blue_Runner · #2 01-08-2007, 07:12 PM

RB,

One thing about brackets - they tend to make the powerhead portion of the motor sit a little lower in the water. That, coupled with a 20 inch motor - which already sits 5" lowever - could make things interesting as far as how low the powerhead sits in the water. Not to mention that at take off, the motor dips lower anyway.

Without hearing from anyone else or knowing anyone who has a 20" on a bracket, my first inclination is to say that it would not be the best idea.

Let see what others think.

Blue

kamikaze · #3 01-08-2007, 07:37 PM

Blue:

Taking off isn't the tricky part, slowing down is! I agree 20" is too short for a bracket that allows the motor to completely trim up with an enclosed transom (26" + etc... )

I have a 25" shaft on a bracket that has 26" of setback on my boat (which isn't balance very well) right now and it still closer than I'd like. I thought on several occasion cylinders 5 & 6 where going to suck water for sure, when coming off plane in a following sea.

Kamikaze

Blue_Runner · #4 01-08-2007, 07:43 PM

I have only ridden on one bracketed boat. A GW with a 250 yamaha 25" shaft. If the cowl wasn't on tight, the powerhead would've taken a salt bath :o

Good infor Kamikaze - that's what we need - some real life experiences!

Blue

macojoe · #5 01-08-2007, 09:05 PM

I would recommend a 25" also but on a 28" set back, Thats what I have. But if installed right a 20" would work.

Your suppose to lift the bracket up 1" for every 12" back. That means your cavation plate will be above the hull instead of even with it.
This gives you the height you need when you hole shot and the rear dips, and the height needed in a following sea.
Even the 25 will get wet if you just jam on the breaks!!

willy · #6 01-08-2007, 09:51 PM

Like I told you in the PM's it works on my boat, and I believe it is because it is 25"s and because mine was installed too high to begin with. But also because I have a 115hp 4cyl.
I think it will handle a Suzuki 140 or a two stroke 150 but I would not want to put more back there.
Some of the rips I drift thru have come close as it is to the bottom of the motor. Though I have been in some nasty swells thru the inlets and it was fine. My freinds 25"Grady dunked it's standard mount outboard almost too high a couple of times when we drifted the rocks in Barnegat Inlet on some tough days. I would be leary if the bracket was not a positive flotation type in my opinion.
A couple of years ago I went to Lake George NY to sea trial a nice V20 there that had a pro installed 30" Armstrong bracket and a 200 HP Johnson engine. If you did not watch your arse coming off plane it would dunk the back of the engine cowling. Too much weight too far back. It was one of the reasons I did not buy that boat.
When I sea trialed Old School with Fillet1 I drove that puppy hard and came off plane in the swells trying to dunk it and could not.
Again I think it is because it is a 28" positive flotation bracket
it is a 115 hp 2 stroke
And it was installed a couple of inches high to begin with which I corrected but it is still at least 1-2 inches higher than what the manufactures say is ideal

Skools Out · #7 01-08-2007, 11:23 PM

i wouldn't do it best thing for is actually a 30" on a hydraulic jackplate on a 28" mounted bracket to have better motor tilt/trim control.

kamikaze · #8 01-09-2007, 12:36 AM

randlemanboater

If you already have a 20 motor why don't you just extend it 5 more inches with an extension?

www.Baymfg.com makes them for many models. I recently got a NOS one off Ebay recently for $31.00 they come up every now and then just keep looking

You can check my gallery, I'm running one on the 235 Evinrude I have hanging now and I haven't had a problems with it.

randlemanboater · #9 01-09-2007, 01:12 AM

I have wondered about extending the 20 to 25 but havent been able to find any info on it. I followed the link but they dont have one for mt Johnzuki. Can you get kits from the manufacturer? And how much is that gonna cost?

randlemanboater · #10 01-09-2007, 01:25 AM

I have been on Johnson.com, no wonder I couldnt find it before, it took like 2 different clicks to find what I was looking for. Now to find prices.

"I am not a smart man, but I know what love is."