Hi,
Went out and took a picture of my Kioritz K3s came out of a 21 CC Craftman string trimmer. It had the front fan and clutch. The flywheel was heavy and round without fins with the mag and points inside. It was mounted in the housing at the back of the engine. The housing was a ready made engine mount. The one problem with it was that the output shaft was not tapered making it difficult to attach a prop adapter. It is set up to run on CH igitation. It has a gloplug adapter in it and will be a great engine to try on GGL that seem to be a great way to go.
Don
Sorry same pix twice!