There's a small access hole to view the flywheel (timing marks are there) located by the steering shaft. Remove the one bolt and the oval shaped cover, also, remove #1 sparkplug and crank engine over so that you know it's coming up on the compression stroke. Turn slowly as the flywheel marks can be hard to see! Align the timing mark to the small notch in the inspection hole. The timing mark is   IGN HC   (stands for ignition high compression)     Hope this helps.    Murray