I have a Mercury 4 cylinder, 90HP oil injected two stroke engine. The serial tag is lost. Other Info is on lower unit near the propeller: "Model 180 , DOEL-FIN". I need to identify the model and serial number of this motor so that I can place an order to buy some spare parts such as crank shaft and rings.<br /><br />I contacted many boat mechanics. They suggested to take the motor or the shaft to them. Well! to carry the motor such a long distance or take off the crank shaft could be a nightmare if I would not find a replacement part! I hope this forums can help.