I think these are one of the greatest designs ever, having seen one in the Powerhouse museum in Sydney, and found a good one which when it starts goes through waist high blade grass like it's not there - when it starts.
It has a 2 stroke engine, with the electronic ignition with coil and ignition module mounted up high. Side pull starter mounted towards the front. Plastic G4 or LM carby with external plastic serrated wheel for idle adjustment.
Always been a pig to start. Decompressor was stuffed, fitted new one. Also new diaphragm in carby and new side to float bowl with new float needle etc.
Have moved the poppet valve so "A" is beside the notch (as per advice from somewhere). New plug. Tested the resistance of both ignition module and coil - both are 6.7K ohms each. Apparent good spark with plug out,and plug held to side bolt.
Sometimes it seems as though the float bowl takes ages to fill and plug dry on removal. Other times plug gets wet.
Often after having carb apart or flywheel off it will be fine and start right up but the next time it's dead again. With flywheel impeding access to air gap between coil and magnet it's not possible to set the gap with feelers etc.
Welcome any thoughts. I think the engine itself is fine as has heaps of power..
Last edited by CyberJack; 08/11/18 09:01 PM.
