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Message board > Engines > Auxiliary Outboard and Bracket.

Message 5 of 5
Posted by member Ricardo bryant on Tuesday 8 June 2021

I have a Hardy seawings 277 with ad41 turbo diesel with single prop.Want to know what size prop to use for the sea.Thanks for your help.

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Message 4 of 5
Posted by member Dirk on Sunday 6 June 2021

* Hi Derek,

I use a Tohatsu 5 HP two-stroke long-shaft engine as an emergency engine on my Hardy 20 Family Pilot. It creates a speed of 6 knots with the water flow and 2 knots against the water flow on the Elbe river near Dresden in Germany. This flow speed of the Elbe is around 2 - 3 knots.

I use a stable "lift" from Allpa as a holder. This can carry 50 kg.


Greetings from Germany!


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Message 3 of 5
Posted by member Derek on Friday 4 June 2021

Thanks Keith, I trawled previous posts but you’ve answered some of the questions I couldn’t find answers to.

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Message 2 of 5
Posted by member Keith Lewcock on Friday 4 June 2021

Hi Derek There is quite a lot of messaging on aux. outboards and brackets. See engines 13th april.

It is difficult to get an outboard at the right depth and then lift it high enough to tilt into horizontal mode. Ideally when running the cavitation plate should be no higher than the bottom of the hull so the prop is at the right depth. This may make the OB tiller more vertical than horizontal but still ok to steer. It is also possible to crudely steer with the main engine. With the prop set at the right depth raising the OB may not allow you to lift it into a fully horizontal position. Most new outboards have a shallow water option which may allow the OB to be clear of the water when raised. It really is about compromise. For non tidal waters I would suggest a minimum of 4hp long shaft with an option for an external fuel tank. For tidal waters 5 to 6hp. 4 strokes can be quite heavy so go for the most substantial OB bracket with at least two springs. All the OB brackets claim unrealistic maximum engine hp and weights. I suggest the hull should be reinforced to take the bracket.My own OB is a 6hp mercury and it weighs 27kgs. An elderly 2 stroke might be a cheaper and lighter option but only really on non tidal waters. Hope this helps. keith

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Message 1 of 5
Posted by member derek on Thursday 3 June 2021

Just got a Family Pilot so I have some brain picking to do!
I want to get a 4 stroke auxiliary and I wondered what would be the minimum engine size to push the boat along efficiently on rivers and canals. Also any recommended brackets that will enable the engine to be lifted clear of the water when not in use? Thanks in anticipation.

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