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When I rebuilt my Seaforth I used leather cloth glued to cut and shaped quarter inch ply. If there is nowhere to screw it to under the deck head, then bond some laths in using either GRP matting or CT1 glue. Once these are dried you can screw the panels to them using coloured cup screws of thin hardwood batons. See picture.
I have never fitted midship cleats on a Mac but if I did, I would get a backing plate of either hardwood or stainless steel at least a foot long and as wide as will fit in the tow rail.
Again, drawings are available to full members. You could also try Jeckells- the original sail makers.
Hi Tanya
My preference is for a large Samson type post about a foot back from the now roller, a nice round one with a large base. Don’t use wood anywhere- just silicon between the post and the boat and inside either large washers or a matching stainless steel plate, and two fairleads (one each side) fitted in the same way. A decent size cleat will suffice in the middle if you cannot purchase a Samson post but steer clear of galvanised ones or wooden packets as they rot easily.
Have you looked through the technical articles to find pictures or articles that may help?
Chris – Technical Officer
Hi Charles
i have gone through all the archive materials on line and other things I have but no sizes were ever given for adding a spinnaker pole, only sizes for the spinnaker and cruising chute sails. One method is to get a piece of wood (2×1) and on a still day put the sail out. Push it out with the piece of wood until you are happy with the set of the sail and then have one made to that length.
Secondly, contact the suppliers of your mast. Tell them the make of boat and foot length of Genoa and they will work it out to make one.
As for the davits, you can get swivel davits which are the best for a Seaforth because of the shape of the transom, or have some made to measure out of stainless steel.
When fitting you will need to reinforce the transom with a minimum of 1” plywood and bond it in (or use stainless steel plate).
Chris
Technical Officer
Although I do most of my Mac repairs myself, at this point I would consult a mechanical engineer (who is familiar with this engine) in order to avoid serious damage.
Chris
Hi Peter.
I’m sorry but I don’t know the answer to this one! Let’s hope that Bob TUFFNELL sees your post. He will know the answer.
Chris
Hi they are moulded in with the hull then
filled with steel, then glassed over to seal
them up.
Chris
Hi Geoff
I’ve had mine from Jeckells (made to order). They’re excellent, and know Mac designs. Most sailing boats have one these days.
If you contact them, they will ask you to take a few measurements and they will make one to match your boat and ship it out to you.
Chris Nixon
I cannot see this being a problem (moving it back). Either that or fit a new shaft, or have a spacer made between the flexible coupling and gear box.
Chris
