Outboard Pod Design

[Bloodzkull]

Bit of backstory,

5.3m cruise raft raider with a Merc 135 two stroke.

Problem is it's a 25inch leg on a 20inch transom and the splashwell takes bunch of deck space I could definitely use.

So a pod it is, needs to have some flotation to offset motor weight being further back etc. 

Does anyone have any advice or experience?

 

[Drop Bear]

Keen to follow this. Boat building is WAY out of my pay scale. 

[Junky]

That's a mission building a pod and a lot of time off the water. 

You can get jacking plates for around $800. 

That will do the trick....no moding the hull either. 

[Bloodzkull]

I considered a jack plate but you miss out on a lot of things too, no swim platform possible, still need the splashwell, extra weight too and it could definitely use a bit more flotation

Im looking at an ally  pod and bolting it onto the transom.

[demarc]

13 hours ago, Bloodzkull said:

I considered a jack plate but you miss out on a lot of things too, no swim platform possible, still need the splashwell, extra weight too and it could definitely use a bit more flotation

Im looking at an ally  pod and bolting it onto the transom.

Boat builder is your best bet. Some boats love pods, other's just aren't designed to have the engine back further. Then you have the design to think about. Do it wrong and the water pressure will "suck" the stern of your boat down making it a pig.

If there are not many hours on your engine, selling and buying the right one might be a good option. Personally I would try the jacking plate as Junky suggested.

[Junky]

15 hours ago, Bloodzkull said:

I considered a jack plate but you miss out on a lot of things too, no swim platform possible, still need the splashwell, extra weight too and it could definitely use a bit more flotation

Im looking at an ally  pod and bolting it onto the transom.

Maybe have a chat to someone like Arnolds fiberglass. I know he is very familiar with those hulls. I would be renewing the transom at the same time if you go the bolt on pod option. 

 

The weight of the jacking plate won't be anywhere near as bad as moving the motor back 500mm. The plate only weighs about 30kg from memory. But that motor going back 500mm will need more weight up front to counter it.....or else the vessel may/will porpoise. That motor would nearly be that hulls max hp. Things get realy touchy on those older hulls when making big changes like moving engines. 

 

 

 

[Bloodzkull]

7 hours ago, Junky said:

Maybe have a chat to someone like Arnolds fiberglass. I know he is very familiar with those hulls. I would be renewing the transom at the same time if you go the bolt on pod option. 

 

The weight of the jacking plate won't be anywhere near as bad as moving the motor back 500mm. The plate only weighs about 30kg from memory. But that motor going back 500mm will need more weight up front to counter it.....or else the vessel may/will porpoise. That motor would nearly be that hulls max hp. Things get realy touchy on those older hulls when making big changes like moving engines. 

 

 

 

Weight up front is a definite consideration, there's plenty to play with there as a new fuel tank and batteries will be going in as well.

The motor is right on max hp for the hull (well, over when you consider it's rated at the prop not the motor)  however it's still a great boat even with the motor sitting 5+inches lower than ideal, a pod even if not perfect is likely to make it better

 

Oh and the transom will be redone after a few test runs to make sure positioning etc is perfect

[rayke1938]

Saw this on gumtree

Cheers

Ray

 

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Ad ID 1148576475

 

 

 

 

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[Hatto]

Hi All

New to forum

Question about pods and weights.

Mercruiser weight is about 400kg + sterndrive  / never liked inboards

Outboard is about 200kgs

I know the mercruiser is inboard the transom but an outboard on a pod is at half the weight.

Is there some sort of calculation thing to work through or is it suck it and see.

Have access to an older boat /project boat  (18ft Glass) and just researching some ideas

cheers in advance

hatto