Merc 2.5 Jet size?

[rbeersy]

I have a 96 Merc 2.5 200hp. Looking to Mill heads to 33 or 34 cc, also do Boyessen Reed's. The only add on it currently has is a Bob's lwp. My question is what size main jets should I go to once I do those two things? Not sure what size they currently have I heard .064? Any help is greatly appreciated!!

[mach351]

Depends on what carbs you have. You most likely won’t need a jet change.

[Merc 2.5]

If ur goin to 145 -150 lbs cranking the stock jetting would b to lean for my liking , then it sure wont b on the safe side , it would b on the edge of lean is what i would think , i run wh carbs on 2.5 with 86s with 145 150 lbs and little port work

[Dave Strong]

Mercury jetted stock motors very safe from factory, highly doubt that with just those mods any jet changes will be needed. If your worried do a cut at max rpm then check plugs and piston wash to see if you lean.

Dave