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Old 06 July 2017, 07:33   #1
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7m O tech outboard conversion

Looking at building an outboard pod for my Otech. Anyone done it to an Otech before? Pretty unique hull design.. should it try to follow the shape of the planing strakes excactly, or would close enough be good enough? How long should it be and what sort of outboard would suit this boat? Was thinking of single 250! Specs says single 200 or twin 150's. single 200 sounds a bit under powered to me. Specs also say bare boat weighs approx 850 kgs(1890 lbs).
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Also is this mains power battery charger that's in this boat any good to anyone? It's a giveaway, only thing I'm in Australia so freight could be a killer! Thanks Guys.Click image for larger version

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Old 06 July 2017, 07:35   #2
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Old 07 July 2017, 00:33   #3
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I have a single 250 on an older 7m boat and it goes like the wind. Had up to 13 people in it at 1900m elevation and was never at a want for more power.

Can't help you with the bracket other than to say it probably needs to be a full floatation bracket to keep the boat in balance. That's what zodiac did for their boat and what other on here have done with the wilards. The zodiac bracket I have is aluminum so it's flat, no strakes. I have plans somewhere if you want dimensions. PM me and email address and I see if I can find them. I think most people have made their brackets a little bigger for the heavier four stroke engines. Mine seems to ride and sit fine with a Suzuki 250

Jason
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Old 07 July 2017, 07:07   #4
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If you want to continue the strakes on the pod and the hull shape doesn't change shape from the transom forward. You could splash a mold off the last metre of the hull and make a fibreglass pod from the mold. I made a part flotation pod for my rib out of ply and glass. I have 2 x 90 s/t on the pod. I needed to have more weight on the back of my RIB as it was a slightly nose heavy under way.
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Old 08 July 2017, 03:40   #5
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Quote:
Originally Posted by r mcdonald View Post
If you want to continue the strakes on the pod and the hull shape doesn't change shape from the transom forward. You could splash a mold off the last metre of the hull and make a fibreglass pod from the mold. I made a part flotation pod for my rib out of ply and glass. I have 2 x 90 s/t on the pod. I needed to have more weight on the back of my RIB as it was a slightly nose heavy under way.

Regards

Richard


It was suggested that I could make a mold off the hull, and make a glass pod. I guess I had in mind making pod from alloy. Not really sure the best way to go. I checked out your build there Richard and have to say that impressive is an understatement . All the best with it mate
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Old 08 July 2017, 09:55   #6
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Todd
I doesn't matter if it is made out of glass, Aluminium,Foam sandwich, plywood. It comes down to what material you're comfortable using. Aluminium would be the quickest method. The material cost will most probably end up similar.
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Richard
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Old 09 September 2017, 06:58   #7
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Does it REALLY matter if the hole from the stern drive is not glassed over? Looking at aluminium pod, so could I get away with large sheet of aluminium as a backing on the inside of the transom,and bolt the pod straight through it!
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Old 04 October 2017, 10:51   #8
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I build a lot ob o/b brackets (currently doing one as we speak for a 32' novi) and typically I like to glass in the hole in the transom especially with the enormous void left from that konrad. But have also just bolted the bracket over the bracket over the existing outdrive hole with good success its just not my first choice. 5200 is your friend when doing the install.
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Old 04 October 2017, 16:39   #9
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Thanks CCMS, this boat had mercruiser bravo leg, so it's fair bit smaller than a Konrad drive. The guy building my bracket has done lots and hardly ever fills the hole and says there's never been any issues.
Is 5200, Sika?
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Old 08 October 2017, 12:17   #10
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5200 its a single part polyurethane sealant made by 3M, its some serious stuff.
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