Okay I know it's been asked over and over, BUT...if you're trying to buy a used K&B 3.5 outboard engine from someone who doesn't have the where-with-all to mic the darn piston sleeve OD or crankcase ID to let you know if it's .750 or .765, how else I can I distinguish if this engine has the 13mm crankshaft and larger crankcase ID/sleeve OD measurement?
I've heard that possibly the serial number could help, but then again I think I read somewhere in this forum that the SN wouldn't be of any use in answering this question.
Is it just a gamble until I get the engine in my hands to actually do them measurement myself? I know...don't buy "used" stuff. Please don't answer with that!
Thanks.
serial number is j0032012