Incompatibility. The long and the short.
First timer here in lots of ways and glad to know Ribnet is out there for souls like me.
I am keen and hopeful to achieve my aim of mounting a long shaft safely on a short transom sib.
This is a restoration project without a time frame and also Importantly one with hardly any real budget Available, so on the cheap as the unit will only be used a few times a year when Iím allowed out by the wife and children. ( they will come along too in the future).
I seek all your wisdom and advice on the following set up;
The sib is a 40 year old Avon s400 ( All the tubes hold air but the hull skin needs 5 small patches here and there. Its a 15 - 16 inch transom depth In the middle then curves up about 1 1/2 inch either side to meet the tubes. It is 30 mm thick plywood. I have remade the ply deck sections so far and made a new screen.
I have yet to water proof the deck and will be seeking advice there too.
The whole set up will hopefully fold away into a small camping trailer neatly with all the kit In it for storage and then for my annual escapes).
The engine is a Merc 7.5 two stroke (circa 1981, currently non runner but turns free, engages into gears and worked 2 years ago Iím told, needs a big clean and service plus a few broken levels but mostly it is all there. Itís shaft from bracket to cav plate is 22 inch).
Iíve got another older model which is seized and battered for spares etc. (both engines cost me 100 quid).
Firstly Iím going to get the engine running ( by way of novice learning from U tube, manuals etc, If that all seems nice, then I would prefer to fabricate some sort of slot -on and then bolt down raised transom piece or if I have to, permanently make and fix the transom to the required height.
This is robust sibs and we once had a 35 hp on it for a season but my fears are that the extended 6 inches of transom and raised hieght of the engine block etc will make it a dangerous set up even thou Itís a 7.5.
I want to keep the prop as close to the surface as possible as I will be going on rivers, canals and estuaries and Sea.
Am I being paranoid about this? And should I just have an easier life and be more carefully with the extra depth of the long shaft in the water?
Obviously I want the optimum performance set up to be able to plane now and agian ( if that is possible with this heavyish boat and a 7.5 ?)
At the end of the day as I said my budget is tight but my dreams of good fun and adventure persist daily.
Any advice and tips much appreciated.
I live in Peckham London if someone knows who I may seek out to for advice in person.