Fit the engine to the complete rubber mount assembly and position it where shown but do not glue in place yet. Fit the coupling to the motor and then bolt the engine mount to the wooden rails. The Strut MUST be fitted at the position shown in the pics above.. Check the drawing above for the position of the tube through the transom. Using Zenoah engines the propshaft should be offset to the right by 6mm as shown on the drawing. Drill a hole for the prop-tube in the ‘V’ of the transom. Enlarge the hole with a round file until the tube is a sloppy vertical fit in it. This is to allow for initial setting up of the strut height with different props etc. When the best strut setting is found this hole can be sealed with silicone tube or silicone sealer. Fit the strut assembly to the transom using the four M4 screws provided and then temporarily remove it. Reinforce the inside  of transom if required with a plywood plate or fibreglass mat and resin. Put a shallow bend in the stuffing tube ( brass tube) near the engine so that the tube lines up with the coupling and then lies in the bottom of the boat all the way to the transom and through the hole in the transom. There should be a gap of 25mm between the coupling end and the end of the tube. The flexi shaft can be passed up through the tube so as to slide smoothly into the coupling to check alignment. The short piece of tube in with the T bar can be slipped over the end of the tube nearest the engine leaving about 10mm of the inner brass tube showing through. The T bar should be fixed onto this tube and then the whole tube assembly with T bar positioned between the rails with the correct gap between coupling and end of tube. Mark the rails at each side of the T bar and drill  through for the T bar mounting screws. Cut the prop tube to length so that it slides into the back of the strut. At this point the strut and T bar can be bolted in Position. The rudder can be fixed to the transom  with the bracket  as close as possible to the strut bracket.  Cut the flexi to length, remembering to leave a gap of 5 to 6mm (not less than 5mm) between thrust washer and the strut. Do not cut the flexi too short, because it has to go inside the coupling. The fuel tank can be fitted in front of or behind and to the right side the engine. Hold the tank in place with rubber bands through hooks fitted to 2 strips of 3/8" wood glued to the hull. The inside of the deck hatch opening in the deck should be cut back until the hatch fits into it. Fix the hatch down using GA8 hatch fasteners or similar at the rear. At the front, glue to rods or a plate onto the underside of the hatch to locate under the front edge of the hatch opening. . The radio box can be fibreglassed in place. Only use balanced / sharpened propellers. We recommend Octura props. The lower fuel nipple on the carb is connected using the tygon (yellow) tubing to the fuel tank feed pipe.  The nipple on top of the carb is an overflow pipe for excess fuel from the primer bulb. 
For Zenoahs and other petrol engines use 1/4" flexi with 1/4" stubshaft.

There are many pictures of a boat build on the Sigma instructions in the technical section of this website. They will help with other aspects of building the Miami.