Quieting a 260 just a bit.

[Carter Powell]

Is there any way to quiet down the roar from a 2.5 Merc 260 without hurting performance. I have lined the cowling with some thin neoprene rubber foam which did help.

Thanks, Carter Powell

[mercrazy]

Intake or exhaust noise?

[Carter Powell]

Intake noise.

[nelson edens]

My experience has been that the Sport jet (rubber coated) reeds make about half the noise of the regular reeds AND they last forever

[KIRCHNER]

i would think you could fab something, using a K&N filter. of sorts. they make lots of styles and sizes and can support big horsepower' they make a pancake like filter, maybe go right on/over your horn...

[skialot2]

For intake noise couldn't you just put an insulated cowl from a fishing motor on it? They are much quieter than the lightweight cowls.

[KIRCHNER]

dont think it would clear the horn. the pan is also extended forward.

[Carter Powell]

I have already lined the cowling and it did help a lot. The cowling is a 2.4 Bridgeport and there is a space of about 3/4 of and inch between the face plate and the cowling. Under this is an opening for the horn to draw air. If this space was reduced to about 1/8" would there still be enough air for the horn to draw. On the alien cowls the front is totally sealed. carter

[KIRCHNER]

check ,where all your cables go into the pan. i use sliced fuel line to seal any gaps around cables. my face plate is lined with closed-cell black foam, factory on a mariner cowl. you dont need much air to feed a 300 h.p.engine. air flow is my speciality, not to brag.