Hi Gary
You will find Mark very helpful here as he is that kind of bloke
As I don't own this particular engine it is difficult for me to be able to help you. However, I am going to make a contribution here in the hope that the photos shown may be of some use. The photos here show a Zenoah engine with all of the bits from Dave Marles. Even though these are different engines I suspect that the concepts will be similar in terms of your new engine. Mark (or anyone else), please correct me on any assumptions I make that are wrong
This photo shows the Zenoah engine with the pull start attached (sits at the bow end of the boat). Note that the pull start mechanism does not bolt directly to the crankcase of the engine. Between the pull start and engine sits the CNC alloy engine mounting plate (one of two plates bolted to front and back of engine with 4 bolts each plate). The pull start is bolted to this front mounting plate with four separate tapped holes . Some pull starts need spacers to get them to sit at the correct distance to engage the flywheel.
Mark mentioned the coil mount needed. In the photo above, that mount is a CNC alloy bracket holding that grey housing with the lead to the spark plug.
This second photo shows the Zenoah engine in the boat. At top of the photo you can see the Carb bolted onto the intake section of the crank case with the insulating block (the black bit just above the cylinder head). With this engine that insulating block is retained with two separate bolts. The Carb is retained with two longish bolts and lock washers also.
At the bottom of this image you can see the water cooled flange containing the exhaust header pipe.
Enough from me. I am sorry that I don't have experience of your new engine. But I do hope that my contribution here is at least of some help and perhaps gives some pointers.
Cheers
Craig