Hi
Tom, 
on becoming a Scott Bonnar owner, your machine is a little beauty!
No Tom, the Model, type and Code are stamped into the metal cover that surrounds the Briggs engine, and the recoil starter, now look at the back of cowling near the intake manifold, it may be hard to see, but it will be there somewhere in 3 groups....please post all 3 for us, the numbers
may start with 61202...
Just try and remove that recalcitrant chain case screw the best way you can...you can't damage much there that can't be easily fixed.
Grumpy will assist you with your Briggs problems, he will step you through the diagnosis...just do what he asks and post the results. Don't worry mate, it will be fun.
Have you got a suitable tool kit to do the job?
Please take plenty of pics Tom, so we can see what you are doing as you go along.
