I recently purchased a new Nissan 18HP four stroke, electric start. This was the first day I had a chance to put it in the water and to my surprise I just can't get the gasoline hose fitting to connect to the motor. It appears that the hole just isn't large enough to fit over plastic shield around the right hand pin. (Not sure what that does!) It looks like it would fit over the brass gas nozzle with no problems but the female hole is just too small for the male latching pin. Does Nissian make different size hoses that may have got packed into my shipment by mistake? (The connection on the other end to the 6 gallon gas tank was no problem.)