3.0 Mercury drilled gearcase?

**89LASER** · 06-12-2019, 08:56 AM

Has anyone drilled a gearcase or leg on a 3.0 liter Mercury?

**89LASER** · 06-19-2019, 08:42 AM

Anybody?

**obrien** · 06-19-2019, 11:13 PM

are you talking about for exhaust relief?

**89LASER** · 06-24-2019, 06:23 AM

Yes, just to let the some exhaust out before the prop and a little noise, this is probably one of the quietest motors I've had.

**obrien** · 06-24-2019, 06:06 PM

on my 3 liter i pulled the tuner out and cut the bottom 5" off where the casting line is. boat had better hole shot, acceleration, and 3 mph top end
if you do that it allows the exhaust to exit above the cavitation plate where the openings are in the bottom of the mid

**89LASER** · 06-25-2019, 06:15 AM

I did it on my 200XP years ago on my Laser and it helped. I just never heard of anybody doing it on a 3.0 liter Mercury. Thanks for the feed back.

**RiChavis** · 06-26-2019, 09:56 PM

89Laser If you need a cut 3 liter one .I have one out in the boat shed some where .I pulled from a 300X some one choped, Not much .If you want to save your tuner and want to go back to the quiet zone .