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Old 23 May 2010, 18:17   #1
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bombard aerotec transom height

hi all, just come back from another cracking weekend in sunny wales.
still tryin to get the transom height right on my aerotec.
started at the beginning of the season by raising the transom with a 25mm block of wood, which was slightly better at reducing the amount of water splashing over the transom.
i am now upto 35mm and its a bit better again but not perfect.
my question is - " have any of you aerotec owners out there put more than a 35mm block on the transom to raise the height and eliminate the dreaded splash back".
gettin bored now takin transom plate off and putting it back on.
somebody out there must know the ideal height for best performance, please !!!!!!
outboard is a tohatsu 18hp 2 stroke.
never had any probs with my honwave/mariner 15hp combo.

oh, and one other question (sorry) does anyone know where i can get the bottom stainless steel stud on the transom that holds the launching wheels in place, we lost it at weekend and it was an absolute pain tryin to get it up the slipway without damaging the transom. good job there was four of us there this weekend. its the small stainless steel stud highlighted in pic 3
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Old 23 May 2010, 20:06   #2
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well on most boats the transom should be either 20 inch for long shaft engine or 15 inch for
short shaft.
But most people find it better to have the engine from 25 - 50mm higher.

Try 50mm , youl still be able to get plenty of water to the water pump and most bigger
outboards have holes in the engine brackets to raise up by about 75mm if needed.

I also need to raise my engine higher to hopefully stop splashback.

When you get it right please post to let us all know results




phill
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Old 24 May 2010, 07:25   #3
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height

my aerotec / mercury 15 will splash up a bit if not trimmed right, but never had to raise the motor though.
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Old 24 May 2010, 10:50   #4
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try www.salterns.co.uk I lost one of the turn keys that hold the wheels on & they came up trumps with a replacement!

Don't know the hight but this is what I did to mine!
Works well for me
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Old 24 May 2010, 14:00   #5
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What is the cavitation plate hight related to lowest point on the transom in Your bombard with the 35 mm extension? 2 stroke Tohatsus tends to have slighly longer rigs than some others.

On my aerotec 420 the cav plate is 50 mm too low, even if the rig is long as should bee on this boat. Just about to do a 50 mm fixed mod, will post picks later.

How is the original transom wheels mounted to the studs, have not seen any pictures how it is atached/done. I have another type of transom wheels, not so great design, considering to change to zodiac/bombard original.
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Old 25 May 2010, 02:53   #6
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bombard aerotec transom height

thanks everyone for the speedy responses.
i am gonna try the 50mm mod at weekend and i'll let you all know how it goes.
hi c-numb. thanks for your input, the original wheels that came attached to my aerotec connect to the transom with a small stainless steel stud at the bottom (the one i've lost), and at the top they have a turn-key type attachment like the one in the pic i've posted. thanks all.
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Old 25 May 2010, 10:08   #7
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Originally Posted by uny1965 View Post
thanks everyone for the speedy responses.
i am gonna try the 50mm mod at weekend and i'll let you all know how it goes.
hi c-numb. thanks for your input, the original wheels that came attached to my aerotec connect to the transom with a small stainless steel stud at the bottom (the one i've lost), and at the top they have a turn-key type attachment like the one in the pic i've posted. thanks all.
Is it possible to buy those turn keys as I managed to get my brother a set of zodiac wheels, but they didn't include the "keys". Is ther a part number for them?
Cheers
Brian.
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Old 25 May 2010, 11:22   #8
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Originally Posted by br1anuk View Post
Is it possible to buy those turn keys as I managed to get my brother a set of zodiac wheels, but they didn't include the "keys". Is ther a part number for them?
Cheers
Brian.
As I said earlier on the post I got them from Salterns!
"Try www.salterns.co.uk I lost one of the turn keys that hold the wheels on & they came up trumps with a replacement!"
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Old 26 May 2010, 17:08   #9
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bombard aerotec transom height

hi all, managed to source the transom studs from nationwide marine in warrington at a cost of 20 for a set of 2 studs (only sold in pairs) inc postage.
seems quite expensive for a couple of bits of stainless steel, but as you probably all know, anything to do with chandlery and.....well.

hi br1anuk, priced up the turn key, they're 10.34 each from ron hale marine, just go on their website and type in (Zodiac Turnkey For Launch Wheels)

sales staff at both nationwide marine and john bridger marine were really helpful, cant praise them enough
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Old 26 June 2010, 09:36   #10
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bombard aerotec transom height

hi all, just come back from wales (again). may as well emigrate i'm there that often.
I just had to go to try out the transom height mod. on the aerotec 380.

As you probably all know its been an ongoing saga for me, started with 25mm block, then 35mm and am now upto what most people on here have suggested at 50mm.

Think this is the best its been regarding the splashback but was wondering whether to try a little bit more height maybe 70-75mm (what do you all think) although the transom is starting to look like a dartboard, its got that many holes in it.

Just want to get it perfect before i screw, glue, fill and paint it.
I've been looking at other transom heights on zodiac and bombard boats and they all seem different.
Some are flat, some scooped out and others as in pic. are raised.

Heres a link to a short vid of our exploits last weekend with my brother at the helm, was quite scary when the wind got under the bow, but great fun. Click this link or copy and paste into the you tube search bar.



Was better the day before with slight chop as the boat was jumping out of the water.
We also got the ringo out for the kids and managed to do a spot of fishing.

Caught a couple of small cod and a few pollock but alas no mackerel (where are all the mackerel hiding).

All in all a cracking weekend again and just pray this weather continues into July and August.
Happy sibbing and see you all soon.
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