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Trailering engines up or down ?

Old 07-26-2020, 08:30 PM
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Default Trailering engines up or down ?

Hi.

I have been trailering my boat a year now. Just started hitting a new spot which is 150 miles round trip for the day. I have twin 150 mercury. I see some boats with outboards only half way up. I usually go all the way up. What’s should I be doing.
Thanks


Old 07-27-2020, 05:28 AM
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I trailer with engines down. I’ve got plenty of clearance that way. If you can’t do it that way, then I’d probably only raise up enough so that it’s still using the trim rams, or use a MY Wedge or bock od wood, etc.
Old 07-27-2020, 06:27 AM
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When you tow use a proper bar type transom saver so some of the weight of the motor rests solidly on the trailer. If you dont use a bar saver then tilt all the way up. In the up position some of the weight of the power head moves forward of the tilt mechanism so the engine is better balanced over the transom. This will reduce the torque stresses on the transom.
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Old 07-27-2020, 06:34 AM
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I trim them up so they sit just on top of the trim rams. Plenty of clearance to the ground and the weight is supported by 3 rams instead of one
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Old 07-27-2020, 06:35 AM
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Transoms are designed for the weight. What they dont like are cantilevered bouncing (although outboard dont bounce much). I have always trailered with my engines in a horizontal position. This way there should not be any real movement or engines wanting to tender totter on the transom...

If you do pull with the engines in the up position, I would not rely on that little motor support for that weight being bounced. Put a 2x4 board in the bracket and tilt the engine down, till it rests on it...
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Old 07-27-2020, 07:00 AM
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Down unless their triples. I put trips at the top of the ram.
Old 07-27-2020, 07:23 AM
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I've always used a piece of PT 4X4 for each engine. Slide it in and trim them down until the weight rests on the wood. I'm sure the transom will take it but why add more leverage keeping them up.
Old 07-27-2020, 07:27 AM
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Originally Posted by cajflynn View Post
Down unless their triples. I put trips at the top of the ram.
Is that just due to the increased depth of the center engine?
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Old 07-27-2020, 08:10 AM
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Mines about 1/2 way up. Mostly for road clearance. I use a transom saver.
Old 07-27-2020, 09:42 AM
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Originally Posted by ktroyer2265 View Post
I trim them up so they sit just on top of the trim rams. Plenty of clearance to the ground and the weight is supported by 3 rams instead of one
+1
Old 07-27-2020, 09:43 AM
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Has anyone seen a transom cracked from trailering? I'm pretty sure it can handle the weight.
Now if your transom is already compromised from water intrusion;I suppose it would make a bad situation worse.
Old 07-27-2020, 11:28 AM
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I've used 2 x 4's with a hole drilled and a lanyard. Presently I'm using M-y wedges.
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Old 07-27-2020, 11:31 AM
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Mine is up with the little support bracket. 2002 motor and no problems yet. It will drag if all the way down.
Old 07-27-2020, 12:36 PM
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I watched a guy with an old Glastron Bass Boat lose his transom (destroyed the boat) from his 250 V6 Evinrude bouncing up and down on the highway (expansion joints hit a frequency node with the motor, and it just got worse and worse). I'm sure the transom was half rotted, but watching that big outboard bounce surely finished it off... the outboard was still attached to the transom (which was sandwiched in aluminum plate on both sides), but the transom was no longer connected to the boat. The steering cables were the only thing hanging on, dragging the pile behind the boat. Fuel line fortunately only spilled a bit of gas...

So, I sure do believe a transom saver is a worthwhile investment.
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Old 08-01-2020, 12:02 AM
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Originally Posted by motoroilmccall View Post
I watched a guy with an old Glastron Bass Boat lose his transom (destroyed the boat) from his 250 V6 Evinrude bouncing up and down on the highway (expansion joints hit a frequency node with the motor, and it just got worse and worse). I'm sure the transom was half rotted, but watching that big outboard bounce surely finished it off... the outboard was still attached to the transom (which was sandwiched in aluminum plate on both sides), but the transom was no longer connected to the boat. The steering cables were the only thing hanging on, dragging the pile behind the boat. Fuel line fortunately only spilled a bit of gas...

So, I sure do believe a transom saver is a worthwhile investment.
If my boat's transom was garbage, I would rather find out on the road than on the water!
Old 08-01-2020, 12:22 PM
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Originally Posted by Varasjohn View Post
Hi.

I have been trailering my boat a year now. Just started hitting a new spot which is 150 miles round trip for the day. I have twin 150 mercury. I see some boats with outboards only half way up. I usually go all the way up. What’s should I be doing.
Thanks

I would rather have them half down on top of Wedges trim supports .
The flippy lever full up is not for trailering , btw.
Old 08-01-2020, 12:30 PM
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Twins and I trailer with them tilted up slightly just +/- 1/4 of the way. I've got plenty of clearance with them down but trim them up a bit for some added cushion in case I take any steep inclines pulling on or off the road.
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Old 08-03-2020, 10:10 PM
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Originally Posted by Inlander View Post
When you tow use a proper bar type transom saver so some of the weight of the motor rests solidly on the trailer. If you dont use a bar saver then tilt all the way up. In the up position some of the weight of the power head moves forward of the tilt mechanism so the engine is better balanced over the transom. This will reduce the torque stresses on the transom.
Sorry, but nothing in this post could be further from the truth.
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Old 08-04-2020, 06:47 AM
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Originally Posted by magua View Post
Sorry, but nothing in this post could be further from the truth.
Then you provide your version of the “truth” and explain why reducing torque forces is not best.
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Old 08-04-2020, 07:56 AM
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Originally Posted by Inlander View Post
Then you provide your version of the “truth” and explain why reducing torque forces is not best.

imo - strictly speaking I believe in a perfect towing scenario the engine would be vertical. However because of inclines and such that is not possible. Trailering with the skeg as low as you can get it without dragging/snagging up is best.

Having skeg as high as it can get is the worse case scenario.

Again imo

ymmv

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