Another stupid question. Sorry

[Dodgy Diver]

I’ve been offered a mega cheap outboard and small tender inflatable. Can I just make a bracket to raise up the engine if I use a long shaft ? Also thinking I could make a lowering bracket to use it as a emergency spare on my 23ft motor boat ? Thanks

 

[Jamie Dundee]

As long as you’re not wanting the dinghy to plane I don’t see a problem with a long shaft OB.

 

[Robin]

My inherited 10ft RIB tender has a long shaft 2 stroke 4hp that works just fine

 

[Rappey]

No question is stupid. It's these sort of questions that can spawn pages of interesting debate .?
You will draw 4" more and be a knot or so slower.
Yes you could add 4" to the top of the transom. Much better than removing 4" to make a short shaft fit an intended long shaft.

 

[Tranona]

Main problems with using a long shaft on a boat designed for a short shaft is that it is cumbersome to handle, increases draft so making it difficult to approach the shore and with some engines you could have exhaust back pressure problems.

A motor suitable for a dinghy (3np or so) will be inadequate for emergency power on a 23'boat. You have to accept that the requirements for dinghy power an emergency main boat power are very different and any compromise will be sub optimal for both.

 

[Dodgy Diver]

the weight and movability is not a issue , im a big lad , but its more about will it do the job if im in the poo so to speak . ive been offered a 10hp long shaft , I can happily lift it on and off with no issues

 

[Tranona]

That will be suitable for a standby, but almost certainly unsuitable for a tender. Tenders that need 10hp are planing types and specifically need short shaft motors. Dual purpose outboards do not really exist because the requirements are so different. The only common "compromise" is a 3hp longshaft on say a 17' sailing boat that could also be used on a dinghy or a short shaft for the dinghy which with a suitable bracket could be used on a small yacht.

 

[Fire99]

I’ve been offered a mega cheap outboard and small tender inflatable. Can I just make a bracket to raise up the engine if I use a long shaft ? Also thinking I could make a lowering bracket to use it as a emergency spare on my 23ft motor boat ? Thanks

It won't be ideal but it'll work ok. There are quite a few instances on the internet (even the odd company that has made brackets) to adapt dinghy transoms to fit a long shaft. It'll be deeper than a short one (if you don't have an adapted bracket) and it won't be as efficient on a tender as a shorty but it'll still work. Many people have done it.

As a backup for your 23ft boat, it does depend on what 23ft boat it is. If it's a heavy one it'll struggle and it also depends on the transom bracket location and if you can get the outboard prop down lower than the boat hull to give it some momentum. Possible problem is that you'll llikely want a little prop for the tender and a bigger prop as a backup on the 23 footer. I had a 23ft sailing boat and 10hp outboard was its main engine and that plopped along nicely, so it does depend on the boat.

 

[Dodgy Diver]

the boat is a heavy sod , 3 tonnes . I went out 3 weeks ago and it died about 500 yds from shore
carb . so I have replaced it with a new marine edelbrock carb also new coil
just worried if it happens again
what would you all recommend for a outboard that I can attach on the corner of the swim deck and ill make a bracket to lower it down and adapt the controlls
there must be some way to have some kind of back up ?

 

[Fire99]

the boat is a heavy sod , 3 tonnes . I went out 3 weeks ago and it died about 500 yds from shore
carb . so I have replaced it with a new marine edelbrock carb also new coil
just worried if it happens again
what would you all recommend for a outboard that I can attach on the corner of the swim deck and ill make a bracket to lower it down and adapt the controlls
there must be some way to have some kind of back up ?

This sounds a lot like my old Shetland Black Prince 23ft which had a 5litre v8 chevy (volvo penta marinised) sterndrive .. She wasn't far from 3 tonnes apparently.

If you have a bathing platform then I would say it should be fairly simple to set up mounting bracket. If it's a long shaft engine it will be way below the waterline so will work fine as a backup engine..

 

[Dodgy Diver]

 

[Dodgy Diver]

on the weighbridge with the trailer and fuel its 3.3tonnes

 

[Bouba]

I’ve been offered a mega cheap outboard and small tender inflatable. Can I just make a bracket to raise up the engine if I use a long shaft ? Also thinking I could make a lowering bracket to use it as a emergency spare on my 23ft motor boat ? Thanks

I’ve raised a transom on a dinghy because I only had a long shaft 5 hp...and I’ve also raised the transom on my tender because the Torqeedo (standard shaft) sat too low in the water and I couldn’t raise it far enough out the water to beach her...in both cases the ride improved

 

[Sneds]

Pm sent

 

[Dodgy Diver]

anyone know how to get hold of admin please

 

[Bouba]

anyone know how to get hold of admin please

Tell us your opinion of Brexit....

 

[Dodgy Diver]

Tell us your opinion of Brexit....

confused here ???

 

[Bouba]

confused here ???

....if you start talking about politics....the admin will find you

 

[Dodgy Diver]

ahh I see so we are going fishing then ?

 

[BruceK]

If you put a high thrust prop on your 10hp, 11x7 or 11x6 it should push your boat to about 3 knts. However steering will be slow and cumbersome so you'd struggle against any beam wind or waves but may still get you out of trouble. You wont plane on the tender with such a prop though.