Mercury Outboard 40hp 30hp Force Mount Cover 821780T1 821780T5 821781003 Mariner Oil Pans From some searching looks like

From some searching looks like the head for an Jet Ski or Jet Mate JS JF JB JL 650 89-95

3L 262CID V6 175hp & 205hp sterndrive engines

There is some surface rust on these

Part Numbers and compatibility confusing section

Fresh Water use

Mercury Outboard 40hp 30hp Force Mount Cover 821780T1 821780T5 821781003 Mariner Oil Pans From some searching looks likeRemoved from a Mercury Outboard 40hp Inline 2 cylinder Two 2 Stroke Oil Injected Part #'s Mount Cover: 821780T 1, 821780T 5 Mount: 821781 2, 821781003 Item Condition and Notes: Good Working Condition Please Inspect Pictures for condition Yours should look like this one. Please ask if you are unsure if this part will work for you. Please send model and serial number. You will receive what is in the pictures. Please inspect pictures closely for