. Thank you Talbot, after checking the link you gave, I stopped hunting for an outboard
spare part and searched for a local o-ring supplier. Went to Applied Industrial Tech (formerly SKF Bearing Supplies) and got a replacement.
Actually, since they come in packets of 50, I had to get the whole packet. Only cost $5.15 so no dramas.
When I got to my boat and looked carefully at the new o-rings, I noticed they were a tiny tiny bit thicker. Hmm. Inserted it into the fuel line connector and tried to slip the connector onto the motor
but no go. Wriggled it and still no go. Somehow ended up damaging the o-ring so pulled it out and put another one in. Hehe, lucky I've got 50. This time I put a smear of grease from the throttle coupling, which was handy, onto it and 'click', it worked. Ran the motor, no leaks
from the hose so I am happy. Wow, the o-ring is only a 10 cent part but without it I can't run my motor.