how to tell a merc 2.0, 2.4, 2.5 apart visually ...

[bigshrimpin]

OC would be around 89 or 90.

[bigshrimpin]

92 and newer carbs will have a stamp on the side WMH carbs.

16's are 200hp carbs :)

wmh - 12 and 13 are 2.0L motors

wmh - 14, 15, 16's are 2.5L motors




Old style wh- carbs . . . the stamp is on the top . . . 1990 and earlier.

wh-20 were the fastest . . . I have 2 sets off 2.4L v225's ;)
wh-22's are the second best 200hp carbs.

Diamond shaped heads are pre-83 motors . . . head bolts on the cylinder walls . . . no oil injection.