How do you find a Mercury part No. and its equivalent Sierra part No.?
For example, say a new full water pump kit for my 1968 1000SS.
Going off this site (http://www.boats.net/parts/detail/merc/M-30221.html
) it says the part No. is 30221, but I cannot find a match not he Sierra catalogue (not to mention its very awkward searching though it).
Also, anyone found a reliable Aussie supplier for Sierra parts?