"D" ported pistons.

[drasticplastic]

When you "D" port pistons on a Merc. 2.4 what carb. jetting changes are usually needed. The rest of the motor is the same as it has been, just freshened-up. The "D" porting was done per. "Cherry 2.4" specs..

[Jay Smith]

Just that mod should be OK with stock jetting ..If your concerned go up a jet size across the board better safe than sorry, you can always come down in jet size.

Jay

[T-REX]

YEA, what pee wee said!!:D

[drasticplastic]

Thank's guy's, I'll jet up 1 and check spark plug color and piston wash. I just needed to know if there was a drastic change in jet sizes, didn't need to "squeak one" before it ever got dialed-in.