Used 1997 Yamaha 30 hp 2 stroke 3 cylinder model 30ESRV Crank Shaft Assembly part number 6J8-11400-11-00 with oil pump worm gear on crankshaft and connection rods with casting numbers 6J800. We had this outboard motor running before we dis-assembled it. We suggest to change all 3 pistons and piston rings.  This part number is according to online manuals.  This outboard motor had serial number 6J8 S 155563 and was assembled in Japan. Calipers and measuring tape are not included but only shown for dimensions. Since these parts are more than 10 years old we suggest to change gaskets and seals. To avoid injury, harm or malfunction we suggest that all our parts be installed by a certified outboard motor mechanic. We only ship to Canada & USA.