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Old 20 July 2015, 11:56   #51
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that's what I like to see good old British ingenuity made in a shed engineering should work a treat that .I tried an aerotec for a weekend once and one of the things I wasn't keen on was the splashing over the transom
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Old 20 July 2015, 19:41   #52
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I assume on our Mercury/Mariner 15 models the splash is because water is getting up to this area??
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Old 21 July 2015, 02:31   #53
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I had same prob with mine ,running with mariner 15 2 st, I raised the transom 50mm and fitted some , dole fines , that fixed it the problem .
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Old 21 July 2015, 02:36   #54
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Quote:
Originally Posted by Fenlander View Post
I assume on our Mercury/Mariner 15 models the splash is because water is getting up to this area??
Not sure - difficult to see exactly but as posted earlier (and read this in other places) I think it's the shape of the hull that jets water up somehow, whether it hits part of the engine and up I'm not sure, I've not had it come over the transom though.




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Originally Posted by dave gunster View Post
I had same prob with mine ,running with mariner 15 2 st, I raised the transom 50mm and fitted some , dole fines , that fixed it the problem .
Don't really want to get into raising it more as this would mean major mods and even with a 26mm shim it will ventilate sometime in very sharp turns/bigger seas.
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Old 21 July 2015, 03:44   #55
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>>>I think it's the shape of the hull that jets water up somehow, whether it hits part of the engine and up I'm not sure

Yes I guess if you imagine an Aerotec towed onto the plane without an outboard there may be a slightly confused meeting of water immediately behind the keel... add in the presence of an outboard leg and unless it all coincides perfectly there's plenty to cause splashing.

Fins probably work somewhat the same as my daughter being in the bow giving a more level or bow down ride. I have a couple of sets in the garage but so far this outboard is undrilled so not keen to experiment.

Really interested to hear the results of your splash shield Max. For me that design using the transom wheel buttons would be another faff at the slip but if the principle is sound you could buy and mount a second set of buttons about at the width of the outer transom pad purely for the purpose of attaching a narrower splash bracket (like the one linked above - post 7 here... Old used Aerotec impressions. ) so it could stay on all the time apart from when you wanted to pack the boat away.
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Old 21 July 2015, 03:50   #56
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I'd leave it on all the time if it works - one of the reasons I wanted to make it from PVC/rubber is it won't get in the way when folding etc or corrode and will be a bit more sacrificial if something goes wrong!

Only issue is how to affix it - pic below shows the L shape PVC bit (without the rubber flap bonded still). It needs to sit here to clear the clips for the wheels.

I reckon either two brackets fixed using the two lower ply engine plate screws, Sikaflexing it or two small screws with spreader washers into the transom.

Sikaflex is favourite (neatest, no screws, reversible) I think.
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Old 21 July 2015, 04:07   #57
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Just looking about other Aerotec threads while we wait for the Scottish sun to appear... guaranteed according to BBC weather... and found this image about matting. What interested me was the very pro job Big Al C has done to raise his transom...

http://www.rib.net/forum/attachment....4&d=1401830893

Can't find if he discussed doing this and what height it is??
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Old 21 July 2015, 04:30   #58
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Check these:

Transom mods aerotec 380, Pictures


Matching a long shaht engine to a medium size transom.

I'm no fan of non-reversible mods TBH and think raising things this much may be a step too far potentially in terms of loading.
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Old 21 July 2015, 05:49   #59
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Two good threads there... the Locozodiac ones got me thinking more about what exactly makes the splash rise up to the engine cowl and perhaps over the transom.

So with very limited holiday facilities I've had the gaffer tape out and crudely "filled" in the gap that could just cause splashing if water is being directed above the upper deflection plate into this area.

Results later.
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Old 21 July 2015, 11:25   #60
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And the result is... 5-10% improvement if that. But I did take my life in my hands and look over the transom at speed... plus do a short bit of video.

It seems the initial source of the splash is the meeting of water from the floor either side of the keel as it joins in the void make by the keel. So the cav plate is often running in confused water unlike a normal flat floor SIB.

Don't think I can upload the video until I get home to the PC at the end of the week.

Back to the bracket mod then.
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