I have a 1997 SCR 2800. I'm finding that most of the parts have been discontinued. Here's what I do:
1) Research the part using the original part number from the online parrts catalogues:
2) Call my local Maxum Dealer and give him the part number. They can cross reference against the replacement part number.
(Frequently the parts dealer will tell me that the part has been discontinued, or that there is no replacement part number for the part.) If this is the case, then I call U.S Marine (Maxum Manufacturer/Parent Company):
U.S Marine Parts & Customer Service Dept.: 360-435-8957
They have far more info. and can give you suitable replacement part numbers to provide to your dealer. I recently called my local dealer to find a replacement holding tank. I was told there is no replacement part number and there are none in stock. I called US Marine and parts told me "Make sure you give them <this part number> and tell them to ignore the original part number as well as the Discontinued/Out of Stock notice. If they look atthe inventory there are still 5 available".
I hope this helps.