Parts with same description in boats.net

[nikosxatz]

In boats.net part listing I find some parts with the same description same reference number but different prices and part number:

5 6CB-13915-00-00 FILTER FUEL INJECTION PUMP 1 (REF # 19) $48.90
5 63P-13915-00-00 FILTER FUEL INJECTION PUMP 1 (REF # 19) $40.50

Some times I find parts with all features the same but listed twice:
7 N26-13440-00-00 ELEMENT ASSY, OIL CLEANER CYLINDER CRANKCASE 1 (REF # 30) $20.40
7 N26-13440-00-00 ELEMENT ASSY, OIL CLEANER CYLINDER CRANKCASE 1 (REF # 30) $20.40

This is confusing in ordering and I dont know witch one should I order.

Can anyone please explain?

[rodbolt17]

the first with characters of the yamaha part number identify what MODEL in the yamaha manufacturing lineup that part was FIRST used on.
occassionally its goes back to a generator or snowmobile then used on outboards.
the second 5 characters identify the part,filter,piston whathaveyou.
the next two identify any model changes to the basic part.
the last two will indicate a color or a size.
the N26 tells me your working on a V8 yamaha,however the outboard model code for a V8 is 6AW.
tells me yamaha used that oil filter on something other than a V8 first.
the 13440 indicates its an oil filter.
the 00-00 indicates it has no supercessions or size or color changes.

when working on the V8 or the F250 I use the parts manager pro program as the parts smart program gets a bit inaccurate.
on the above engines you have to pay close attention to seriel number breaks and production date code breaks.