75hp merc triple carbs on 40 merc

[BRzuki]

What (if any) is the issue with putting the 75hp merc carbs on the 40/50/60 motors? They look all the same except the venturi diameter, but I haven't heard of anyone doing this.

Seems to me that the displacement is there to benefit from the extra fuel and air but maybe there is something I am missing.

[fs5]

what model 75hp is it mate?
i was looking into getting bigger carbs for mine and the old 75/90 ones were the same as whats on my 55.
dunno about the newer models though.

[BRzuki]

year 2000 or newer models

[fs5]

have you measured the venturi on them?(at the butterfly)if you have whats the diameter mate?
you might be onto something!

[lcp]

look like they shared the same carb with 90 mercury 3 cylinder.....any idea who can port these lost foam type mercury 40?

[BRzuki]

I haven't measured anything...don't have them in my hand but found some for sale and was curious.

[fs5]

i measured a set off early 90's motor and they were excactly the same.
might do some searching on mercruiser parts and see what i can find.

[60mercury]

I found that the 75 hp 2001 above have .620 jets my 60 carbs have .060 ' I ordered .620 jet n put in my motor n Gaines 200 rpm

[Mark75H]

More importantly, what color change was made on your spark plugs?

[Jackson]

More importantly, what color change was made on your spark plugs?

I agree!