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Old 21 June 2009, 15:31   #1
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The danger of auxhiliary outboard brackets - more hassle than they are worth?

Went out in the solent today for a spot of fishing, on my own as I sometimes do. As some of you know, I now have an auxiliary outboard on the back of my boat, for that extra feeling of safety etc, with a Tohatsu 9.8 on it. It's held up really well for the past few months since it's been mounted until today.
It's one of these by Plastimo (not from marine scene I might add):-
http://www.marinescene.co.uk/product...tboard-bracket

Well, en route to the needles today, I heard some strange metallic clinking sounds, but could not work out what from even though I stopped and had a look around. Then was hearing them again, and before I stopped, I heard a snapping sound, looked round to see the aux engine lying at a strange angle, only help up halfway in position by the strap to the seat back

Went to transom, and the top lever arm of the bracket had snapped at the transom mount! With the outboard locked onto the bracket, and the bottome arm looking like it was going to give way, I had to get the socket set out (I normally get criticised for taking so much stuff with me, but glad I had them today). I had to unbolt the mounting pad to get the outboard on deck, not the easiest thing on your own in a bouncing boat whilst trying to hold up a 10hp outboard.

Really lucky the outboard was also strapped to the rear seat back, or it would have been overboard, but also lucky the bracket snapped the way it did, the other way would have send the aux leg into the prop of the main engine (not sure I would have stayed in the boat if that had happened, or if it would have stayed the right way up for that matter).

So, the bracket is rated to 10 hp. Is it also rated to certain maximum speeds or sea states? I've been out in much worse than todays conditions.

Anyone else had this problem?
Or got a different type of bracket that's more up to the job?

Or are they just not suited to the world of RIBs?

Thanks for the feedback, a rather relieved Neil
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Old 21 June 2009, 15:39   #2
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i m.h.o. i suppose with a lot of marine stuff its aimed at the sailing yachting market and not suitable for high speed bouncing about ,though still should be up to the job .
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Old 21 June 2009, 15:45   #3
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I assume the Tohatsu is a 2 stroke ?
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Old 21 June 2009, 15:47   #4
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I have never seen an outboard bracket that struck me as man enough for a thrashing on a RIB.

On my last Rib I mounted the engine directly onto the transom and was far more comfortable that it could take a bashing.

Having said that on these smaller outboards even the tilt bracketry is not too strong and I kept a close eye on my Yamaha 5HP to make sure it did not weaken and break and I always had it strapped down to prevent it bumbing around too much on the bracket.
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Old 21 June 2009, 16:11   #5
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Quote:
Originally Posted by Bigmuz7 View Post
I assume the Tohatsu is a 2 stroke ?
yes

Quote:
Originally Posted by m chappelow View Post
i m.h.o. i suppose with a lot of marine stuff its aimed at the sailing yachting market and not suitable for high speed bouncing about ,though still should be up to the job .
I've had them on boats before, and not had a problem... but yes, should be up to the job unless they specify not for planing craft ...

Quote:
Originally Posted by Chris View Post
I have never seen an outboard bracket that struck me as man enough for a thrashing on a RIB.

On my last Rib I mounted the engine directly onto the transom and was far more comfortable that it could take a bashing.

Having said that on these smaller outboards even the tilt bracketry is not too strong and I kept a close eye on my Yamaha 5HP to make sure it did not weaken and break and I always had it strapped down to prevent it bumbing around too much on the bracket.
Direct on the transom would be my preferred approach Chris, but
I have those transom boxes that prevent it. Back to plan A, and finding a way to keep the boxes and still transom mount, maybe a cutout in the starboard box with a new glassfibre insert so it looks neat, but allowing the aux to drop onto the transom.

It was strapped up, because the tilt mounts on the engine are indeed useless.
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Old 21 June 2009, 16:57   #6
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I had a similar problem with the same sort of bracket, was out one night a few weeks ago and decided to give the aux a run. I keep it mounted inboard, so the bracket is only used when actually needed. Anyway motoring along at 4.5 knots when i hear a bang look over my shoulder and see the blooming engine disapearing over the back! The moulded plastic mounting plate broke clean in half, luckly i always tie the motor to the a frame with rope when in use and also had the kill cord tied to the a frame so the motor died before it got semi submerged. Thank goodness it happened when it did and not in a main engine breakdown situation. I think these brackets are marginal with 6hp never mind 10hp.
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Old 21 June 2009, 17:22   #7
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Hi Neil as you can see I do most of my crusing in and about the west of Scotland and have always had my aux directly on to the transom. Most of my mates do likewise.
Hope this helps.
J
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Old 21 June 2009, 17:32   #8
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Quote:
Anyone else had this problem?
Or got a different type of bracket that's more up to the job?
I've got exactly the same bracket. It certainly clink/clunks when underway. Luckily I only have a Tohatsu 3.5hp on the bracket, but I use a ratchet strap to keep tension on it in the 'tilt' position, and use a block of wood for extra support. Tohatsu's tilt lever is next to bleed'n useless. Not sure what the answer is, possibly a fixed transom bracket. Something along this lines, but custom made to handle 10hp.
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Old 21 June 2009, 17:34   #9
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Quote:
Originally Posted by jambo View Post
Hi Neil as you can see I do most of my crusing in and about the west of Scotland and have always had my aux directly on to the transom. Most of my mates do likewise.
Hope this helps.
J

Hi, I admit that would be best where practical, but that's not always the case. I just think things should be fit for purpose, and if not suitable for planing craft, they should say so!

Like I said, time to mock up some mods for the transom box, then it can hook direct onto transom
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Old 21 June 2009, 17:40   #10
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I have U bolts fitted to the transom and have the aux strapped to them while on the exact same bracket, mine is going nowhere!
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