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allyfreak2
12-12-2009, 12:49 AM
how many more jet sizes to go up without the air box on a 2.4 merc?

Capt.Insane-o
12-12-2009, 01:06 AM
I never found it made a difference as most merc air boxes flow pretty well. Lately I've upping the mains 2 due to the gas we get up here. Plug and piston top readings will tell you what the motor wants.

T-REX
12-12-2009, 10:30 AM
:iagree::iagree:

Merc motas are fat from tha factory...One way mercury assures less warrantee returns...:D:D

Ukan remove airbox and install velosity stacks witout a jet change(if U leeve the cover intact...U start open'in tha cover, then ya change tha ballgame)