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Old 25 May 2016, 03:43   #21
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Going through this thought process myself but probably at the wrong time with a damaged shoulder and I can just about lift my hand!

How are those with 25's on the Aerotec finding them?
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Old 25 May 2016, 04:17   #22
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I had a 15hp on my Aerotec, used it a couple of times, sold it and bought a 25hp. Would never have a 15hp on an Aerotec again ...
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Old 25 May 2016, 05:23   #23
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How are those with 25's on the Aerotec finding them?
I'm really interested to hear how people are doing with a 25hp on an aerotec
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Old 26 May 2016, 06:46   #24
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I had a 15hp on my Aerotec, used it a couple of times, sold it and bought a 25hp. Would never have a 15hp on an Aerotec again ...
Well, I had a 25hp on my Aerotec, used it a couple of times, sold it and bought a 15hp.

The whole point of an Aerotec to me is keeping it light and easy to manage and I still reckon a 15hp is the best compromise of convenience vs performance. For me the aggravation of lugging a 25hp around outweighed the performance benefit. Lightly loaded I've found 15hp to be plenty, and with loads of people on board I don't want to be going to fast anyway as everyone ends up in a heap!
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Old 26 May 2016, 08:01   #25
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Simonafloat i am currently using a 25hp 2 stroke on my Aerotec and appreciate your concerns.
The weight is obviously more noticeable getting in and out of the car, but up to now i have only had to lift it from the car straight onto the transom. I have got some decent launch wheels which take all of the weight and once the 25 is on the transom the extra weight over the 15 is next to nothing.
If the taxman is kind how about a Suzuki df 20 at 44kg if you are worried about the weight.
How do you find it 1 up ?

What size shim do you use ?
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Old 26 May 2016, 09:18   #26
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Which 25 are you using Sean?
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Old 26 May 2016, 09:23   #27
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Which 25 are you using Sean?
early 80's Yamaha
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Old 26 May 2016, 14:51   #28
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How do you find it 1 up ?

What size shim do you use ?
1 up its great! Of course there are plenty of times when conditions dictate you cant use all of the power but when you can open it up its got a short power band of fairly brutal acceleration that just puts a grin on my face. The best thing about it though is that it cruises comfortably at 17-18 knots where the 15 i had previously was getting thrashed at that speed.

I have a 25hp Tohatsu that i had to shim up about 60-65mm to stop the transom splash, though i did get a 3mm stainless steel plate made up to help spread the load.
With hindsight and some extra cash i probably would have went for the Suzuki df20.
Your Yamaha will no doubt need a different height shim but a few test runs will highlight the best height.
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Old 26 May 2016, 17:58   #29
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I was running a Mercury 15 on our aerotec 380, liked the idea of trying a 25, but had to be cheap at the time. Going from 36kg to 50/55kg seamed a bit of a jump, but had a look. Came a cross a Johnson 30hp,,, mid 80s through prop so could only be from 84 onwards. 20-35hp all the same weight. When I first saw it,,, it was a no no,,, it looked huge and at 52/53kg thought no. When back 2 days later and bought it,,,, its great fun.

So ran either the 15 or 30 for a year or two, but needed some space and cash so sold the 15,,, have not missed it. That was shimmed up 25mm and the Johnson 50mm.

Have since bought an nearly new tohatsu 25 2stroke (51kg), so the Johnson is going. If we are going some where new to launch, I find out as much info on the site as poss. With using launch wheels on the boat as long as its not mega steep we have no problems. The most awkward part with the engine is the lifting in and out of the boot. I now have the shim down to 40mm and have no problems with the water over flow.
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Old 26 May 2016, 18:15   #30
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I have a 25hp Tohatsu that i had to shim up about 60-65mm to stop the transom splash, though i did get a 3mm stainless steel plate made up to help spread the load.
That's interesting... I also needed a 60-65mm shim for a Tohatsu 9.8
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