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Old 21 July 2015, 14:41   #61
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Good try though!

Decided to cut mine down (before I read your post!) as it was a bit in the way, also riveted the rubber as glue will not hold for long I think. Sikaflex is defrosting and I've done a test piece to see how well it might hold to the transom......





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Old 21 July 2015, 17:30   #62
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David, any chance on your trip you could gaffer tape a piece of plastic a la Loco's second anti splash plate to see if it really could be that simple?
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Old 21 July 2015, 17:43   #63
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I'm pretty sure the splashing is not engine specific, mine splashed with both a Yamaha 8 and 25hp.

I thick the general feeling that the spashing is caused by the hull shape is correct.

Love the spalsh guard Max, hope it works, Dragons Den next stop

For comparison, the Yam 25hp on mine with no shim. A 35mm one seems to work best.

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Old 21 July 2015, 20:58   #64
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>>>any chance on your trip you could gaffer tape a piece of plastic a la Loco's second anti splash plate

Well I've searched the holiday cottage for anything suitable and no luck. But have a look at these stills from the video made earlier to get an idea of just how much confused water you need to hold back.

This was at about 15kts two up trimmed in middle posn and with a 20mm shim. It looks like the leg is deeper in than it actually was as the spray in the images makes the water level look higher than reality.

I'm thinking it will take the bracket idea to hold that lot back.
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Old 22 July 2015, 02:33   #65
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Sikaflex will not work, failed to hold.

Back to the second anti splash plate idea, not sure, will have to try it to check I guess, just it would be much more preferable to have a little permanent plate on the engine that a big flap off the back of the transom.

Loco's was a long leg but he did seem to conclude that it was the water travelling vertically up the leg and specifically hitting the bracket that directed it upwards:

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Old 22 July 2015, 02:35   #66
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Splashing looks pretty significant:

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Old 22 July 2015, 02:36   #67
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Borrowing Loco's pics of the plate attached:



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Old 22 July 2015, 02:38   #68
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could it be this simple on the Mariner/Mercury?:

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Old 22 July 2015, 02:54   #69
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Something like this on the Mercury/Mariner?
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Old 22 July 2015, 03:19   #70
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It would be a miracle if a tab similar to that held back the inverted waterfall I'm getting. I think you are the chap to make one of those that tapes or clips on in addition to the bracket and trial both.

We are just setting up this morning for the last trip of the holiday and then it's back home. Spare boat to sell and a car to buy/fettle for youngest daughter who is 18 on Friday. I reckon we'll not get to the sea for a month to try again.

The last thing I'm trying this morning before it all gets washed off and packed away is two shims that total 44mm which will be more than 50% over the previous thickest. If they were a decent improvement then a (reversible) lift of the inner/outer transom pads will be needed.
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