Not sure exactly what's wrong, but suspect bottom crank seal which means the power head has to come off. Top seal was replaced on Friday but it is still coughing. Also noticed crack in gearbox case which has been repaired by previous owner but really needs addressing before it splits and I lose gearbox oil. Decided it's best to sell that one for spares and get a new engine.
If anyone wants a non running yam 40 autolube for parts let me know.
Tigga - Avon SR4 Rescue with 40hp Yamaha 2 stroke
Rib Tigga an Avon SR4 Rescue with Honda BF50
MMSI 235910073 Callsign T123046