Isn't the starter motor mounted on the bulkhead on that one?
There is two Allen bolts holding starter gear to the engine case. Underneath the exhaust manifold. IIRC, manifold has to come off. And just unbolt the starter motor. But the cable from the starter motor to the gear drive slides off the starter motor if you just have a bad starter motor.
This should be how yours is. But if its not, disregard this.