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Old 02 February 2016, 17:10   #11
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Country: UK - England
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Boat name: Nimrod II
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Simon muddy waters good if it helps sort the issue and don't doubt what you say but that's a bit weird re measurements. In the attached image I happen to have a level as a straight edge across my 380's transom and you can see that the standard cut down from straight across is close to the height of the level which is only 2.25" so you'd assume if things were as they seem from your understanding of the 420 then a longshaft on a 420 would be 2.75" deeper in the water than a shortshaft on a 380... and deeper in the water seems to be what Aerotecs dislike re spray.

And Neil mentions wanting to raise the height by 7.5" so I wonder if he has a "long" longshaft? If his older model 380 has an identical transom to mine... which I think it does... then the 7.5" lift would need a plate sticking 5" above the line of a level transom. All very odd??
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Old 02 February 2016, 17:14   #12
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BTW while searching on Aerotec 420 transoms I came across an image showing a DIY spray deflector of a type I'd not seen before and it's so so simple!

http://img1.hyperinzerce.cz/x-cz/inz...su-30-hp-4.jpg
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Old 03 February 2016, 02:40   #13
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Quote:
Originally Posted by Fenlander View Post
BTW while searching on Aerotec 420 transoms I came across an image showing a DIY spray deflector of a type I'd not seen before and it's so so simple!

http://img1.hyperinzerce.cz/x-cz/inz...su-30-hp-4.jpg
Nice setup ! I wonder how he mounted the steeringconsole ?
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Old 03 February 2016, 03:32   #14
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i agree with fenlander short 15in, long 20in extra long 25in so he should only need to lift 5in a false transom might be the answer if only talking 5in made from ss plate for strength.for me i would look at shortening the shaft especially if the boat is to be used to its full potential. OMO

cheers
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Old 03 February 2016, 03:34   #15
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Quote:
Originally Posted by Fenlander View Post
BTW while searching on Aerotec 420 transoms I came across an image showing a DIY spray deflector of a type I'd not seen before and it's so so simple!

http://img1.hyperinzerce.cz/x-cz/inz...su-30-hp-4.jpg
i ve seen that before on larger boats very simple good find david, i do like that A frame sets the boat off.

cheers
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Old 03 February 2016, 06:04   #16
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That's a cracking looking Bombard.
Looks just the ticket.
You could transport a car on that trailer let alone an air floor sib:thumbup:
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Old 03 February 2016, 18:02   #17
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Ok, that transom mod won't help me as I have a waterfall under the ob handle!

Raising 65mm has fixed it. Less may work but I don't know.

LS ob is 20". 5" more than short but I need to raise by 2.5" potentially to remove the usual issue, hence 7.5" comment.

I also wondered if the 420 just did away with the cut out, hence my idea of raising transom maybe not being too much of an issue, because the stresses are in the same physical location on tube to transom fixes.
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Old 04 February 2016, 03:01   #18
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not about the original problem but linked if anyone requires making the water deflector for the transom direct plastics in sheffield supply all kinds of sheet material 2-3mm HDPE would be ideal as its easy to cut and can be formed by a heat gun for right angles etc also thicker material for backing plates to secure to the transom just for info.you can cost it on the web site to see if within you budget they also offer a cutting service.

cheers
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Old 06 February 2016, 10:21   #19
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Stig - thanks for your thoughts
Need to try in between and see what works with a Yam 20 or 25 ss when I sort it, if that plan works.
The Yam 20 ss plan is coming together. Collected a late 70's (roughly) Yam 20 ss in the week. It was described as "BEEN STOOD IN GARAGE FOR ABOUT 2 YEARS. WAS RUNNING WELL WHEN TAKEN OFF BOAT AND REPLACED WITH A BIGGER MOTOR. WILL PROBABLY NEED A SERVICE SO SOLD AS SPARES OR REPAIR"

Decided it was worth a punt for 200. After fixing some silly issues this morning, it is now up and running nicely. Needs the tiller arm sorting, a new thermostat, new impellor, spark pigs, and a bit of re-wiring. But should be a running order 20 short shaft for less than 300 I hope. Then time for a play.
It's 42kg, so a bit easier to man-handle than a 25 as well.
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Old 08 February 2016, 04:32   #20
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Be really interesting to know if this 20hp changes your splashback issue. Going from 9.8 to 20hp will make a nippy outfit for sure though.
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