Adding an out board crane/davit ideas ?

Ok so I think I have a plan . Does anyone know if a 38mm od X 3mm tube will go into a 42mm od X 2mm tube (IE 38mm I'd ) . And anyone have any suggestions as to suppliers on the south coast (based on the iow) .
 
PCUK said:
I made these for a sport fisher. Maybe one would do what you want. Any size and design you like.
I can swing on the end of one of these and I am 14 stone (88Kg).
A lot cheaper than the Plastimo as well!:giggle:

View attachment 151020
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Are you south coast based ? I have some drawings I've been working up - do I assume correctly you are a stainless guy
 
dunkelly said:
38mm od ...will go into ... (IE 38mm I'd ) .
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It night if the tolerances on manufacturing are in your favour on the OD and ID of both parts. Otherwise, likely not, and if they do, will likely jam up at a later date. Depending on the swallow, it might be an easy job with aluminium oxide wet and dry to open up the ID and reduce the OD sufficiently to have a reliable fit that that will be rigid and reduce the risk of jamming.
 
Why would you need such a close fit... I assume this is for the lower end of a bent tube davit to sit into some sort of mount, in which case a larger diameter mounting tube would allow for some sort of plastic liner. This would allow for easier swiveling (and avoid the clunk of metal against metal), even if it were just a square cut from an old Tupperware style tub and bent to fit inside the lower part.
 
Or thinking even more laterally... the fitting on deck could even be something like a plastic sheave (like you'd get as a bow roller) bolted lightly down onto a plate on the deck. The lower end of the davit tube could then just rest over it.

(The sheave would lie horizontally and not vertically as it would have done in a bow roller)!
 
The plan I'm thinking of is an 80cm 42mmx2mm tube fixed to deck and pushpit ,(multipurpose to hold solar panel w.h..y . Then insert the davit/crane 38mm X 3mm into this about 30cm with ? Thumbscrew bolts to secure for lighting outboard . Pull out when not needed and stowed . Like the idea of a plastic insert but wouldn't want to go for much bigger holding tube or a much smaller crane arm I think
 
dunkelly said:
Are you south coast based ? I have some drawings I've been working up - do I assume correctly you are a stainless guy
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I'm a semi retired semi professional boat rebuilder and stainless is just one of the many trades I cover. Based near Tiverton in a barn in a field! I've made items for other forum friends and not had any complaints so far. If you're ever up this way you're very welcome to drop in.
 
I still try and surf occasionally in North Cornwall . Next trip in June .if you are not away sailing ? Can you bend 35 mmx 3 mm tube - and it would need a lug welded on the end to take tackle ?
 
I had this one made by a local stainless steel shop, quite pleased with the result although once rigged I realised the bend in the top serves no purpose! It's positioned so that when the tender is moored alongside, it lifts the outboard straight from bracket to transom.
20220702_164459.jpg
 
SimonKNZ said:
I had this one made by a local stainless steel shop, quite pleased with the result although once rigged I realised the bend in the top serves no purpose! It's positioned so that when the tender is moored alongside, it lifts the outboard straight from bracket to transom.
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Yes please Simon that will do nicely . Any chance of delivering to Christchurch so I can take it back on the plane with me when I fly back 1st march lol.
 
Martin_J said:
I wanted to make life easier a few years ago as well... Getting the 2hp stroke back on board was easy but it just wasn't going to happen with a newer 4 stroke 6 hp.

I went for the lifting davit from Force 4 because it looked simpler than the other options.

Force 4 Engine Lifting Davit | Force 4 Chandlery

View attachment 151007

Dimensions area on their website. The upper bracket clamped around the pulpit rail and luckily for me, the lower bracket just bolted to the toe rail.

With it fitted in the right place it will lift the engine off the pulpit mounted stowage bracket, swivel and then lower it a pre-determined (with a knot) amount so I can then just get into the dinghy and guide it onto the transom. I don't think I'd manage the bigger engine any other way.

I must admit I did fit a larger block and tackle to the end but that was to make the lifting even easier.
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Hi,

I know this is an old thread but hoping for a bit of advise and your experience so far.
Also getting a 6hp 4 stroke outboard and was thinking of getting the same lifting davit but am a bit worried about the 2.1 purchase.
My wife may well be doing the lifting so want it fairly easy and controllable.
You mentioned adding a larger pully - did this make much difference? Alos does the rope get jammed at the top as it exits the single pully?

Cheers, Steve
 
stephen_h said:
Hi,

I know this is an old thread but hoping for a bit of advise and your experience so far.
Also getting a 6hp 4 stroke outboard and was thinking of getting the same lifting davit but am a bit worried about the 2.1 purchase.
My wife may well be doing the lifting so want it fairly easy and controllable.
You mentioned adding a larger pully - did this make much difference? Alos does the rope get jammed at the top as it exits the single pully?

Cheers, Steve
Click to expand...
If you can arrange the line from the 2;1 purchas block to feed to one of your sheet winches as I have done it makes it very easy to like any small outboard.

I do this with my 15hp mariner outboard

https://flic.kr/p/232mReh
 
stephen_h said:
Hi,

I know this is an old thread but hoping for a bit of advise and your experience so far.
Also getting a 6hp 4 stroke outboard and was thinking of getting the same lifting davit but am a bit worried about the 2.1 purchase.
My wife may well be doing the lifting so want it fairly easy and controllable.
You mentioned adding a larger pully - did this make much difference? Alos does the rope get jammed at the top as it exits the single pully?

Cheers, Steve
Click to expand...

Steve..

As per the earlier photo... I actually added two separate pulleys (I like a failsafe)..

It was a ten minute hash up with what I had available.. and a good few years later I have no reason to change it.

Screenshot_20230925-120025_Gallery.jpg

I'm sure the hole was already through the pole and the original pulley spindle was perfect for hanging the other.

It was actually a single rope I used (didn't want to cut it into two) and there's a lot in it that limits how far the engine can be lowered. Works fine for the Yamaha 4 stroke 6hp.

Screenshot_20230925-120119_Gallery.jpg
 
Looking down the wrong end of the telescope. Get a much lighter arrangement e.g. trolling motor or torquewedo. 4 stroke outboard and oldies don’t do well
 
stephen_h said:
Hi,

I know this is an old thread but hoping for a bit of advise and your experience so far.
Also getting a 6hp 4 stroke outboard and was thinking of getting the same lifting davit but am a bit worried about the 2.1 purchase.
My wife may well be doing the lifting so want it fairly easy and controllable.
You mentioned adding a larger pully - did this make much difference? Alos does the rope get jammed at the top as it exits the single pully?

Cheers, Steve
Click to expand...
With my setup I fined it easier for the person in the boat (me) to hoist on the rope while the person on deck (wife) guides the motor and davit to the correct position
 
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