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Old 27 March 2021, 07:50   #1
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Otech 7m Military outboard conversion

Finally finished and posting something on my lastest project boat...engine and drive were removed before landing in Australia. Super happy with performance... 700 mm full floatation pod with low hour 2001 Yamaha 250hp 2 stroke, first of fuel injection. Sweet motor. More to come!!
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Old 27 March 2021, 07:57   #2
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Old 28 March 2021, 09:49   #3
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Old 02 April 2021, 13:23   #4
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Probably a bit thirsty but that thing has to fly now!
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Old 04 April 2021, 08:29   #5
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Quote:
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Probably a bit thirsty but that thing has to fly now!


It does fly and is a bit thirsty.. tops out at 44 knots with the original Yamaha prop! will change over to 4 stroke one day, but find it a sweet motor.. low hour. Feul injection .
Wasn’t sure how it would perform with outboard , but seems to handle anything we throw at it
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Old 04 April 2021, 08:35   #6
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Old 04 April 2021, 11:47   #7
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I know some people disagree, but to me 44 knots is "fast enough"!

That bracket makes it sit perfectly in the water.
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Old 05 April 2021, 08:19   #8
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I know some people disagree, but to me 44 knots is "fast enough"!

That bracket makes it sit perfectly in the water.


Haha yeah plenty fast enough and out of the hole is instant . Happy with the pod too
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Old 05 April 2021, 13:23   #9
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Do you deflate the tube to tow?

I know Australia has some rather restrictive width requirements compared to the US.

8 ft. ? Here the standard is 8'6 but anything under 10'0 is a simple $100/yr permit (no signs, no pilot cars)
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Old 06 April 2021, 06:17   #10
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Here in Queensland,We can download a permit to tow long or over width boats or trailers ,between 2.5 meters ( being our max standard trailer width) and 2.9 metres(8.2 feet to 9.5 feet),which has a heap of rules around it like “over with” signs front and back and flags on widest points.. driving daylight hours .. no major roads in peak times etc.
Over 2.9 metres you need an escort vehicle
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Old 06 April 2021, 06:20   #11
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Otech 7m Military outboard conversion

[ATTACH]136891
My previous boat ex Australian Navy
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Old 07 April 2021, 13:10   #12
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Quote:
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Here in Queensland,We can download a permit to tow long or over width boats or trailers ,between 2.5 meters ( being our max standard trailer width) and 2.9 metres(8.2 feet to 9.5 feet),which has a heap of rules around it like “over with” signs front and back and flags on widest points.. driving daylight hours .. no major roads in peak times etc.
Over 2.9 metres you need an escort vehicle
Sounds pretty simple for slightly overwidth. (just like here)

I've been looking at Australian cats and always thought the rules were much stricter since they make all these cats that look way to narrow for their length because they have a 2.5m beam.
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Old 07 April 2021, 19:46   #13
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good looking bracket...

Very fine work there Todd. I love the bracket and how the boat sits with it.
cool.

And yes 44 knots is pretty fast in a Willard.
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Old 07 April 2021, 22:43   #14
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Nice boat!
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Old 10 April 2021, 07:54   #15
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Quote:
Originally Posted by ncp View Post
Sounds pretty simple for slightly overwidth. (just like here)



I've been looking at Australian cats and always thought the rules were much stricter since they make all these cats that look way to narrow for their length because they have a 2.5m beam.


Lot of the cats and other trailer boats built here are max 2.5m because strict rules of trailer width... the permit for over width boats was brought in on the back of lots of boats being imported from the states.
Cats are popular offshore boats here mainly used by fishing charters and rescue/ police . Rescue and police are fast changing to RIBS
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Old 10 April 2021, 08:06   #16
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Very fine work there Todd. I love the bracket and how the boat sits with it.

cool.



And yes 44 knots is pretty fast in a Willard.


Thanks mate, I enjoyed the process. I was too impatient on my first build with the ex Australian navy rib and didn’t allow myself to enjoy it as much as I wanted too. I would of done a few more things to it, while I had it apart. Live and learn.
Your project look cool... the D6 are meant to be an absolute screamer.
Enjoy the process.
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Old 10 April 2021, 08:06   #17
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Nice boat!


Cheers mate
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Old 11 April 2021, 01:11   #18
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Does anyone know much about the hull design on these Otechs I remember reading somewhere on here that they were a uk design.
Looks like Ocean Technical Services have gone out of business and am keen to find out a little more about their history.
Different hull design to Willard/ H733, but I gather same build specs.
TIA
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Old 11 April 2021, 12:14   #19
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I have a duarry cormoran and this is almost the same boat. (Console is a bit different)
Also zodiac has a boat almost similar to these ribs, so for info u can try search these companies.
For my use i have installed a alamarin waterjet, motor is stil the Volvo Penta kad44 Click image for larger version

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Old 11 April 2021, 22:20   #20
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Cheers mate, nice boat they’re a dry ride.
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