veloc410

I saw fountain Express with exhaust tips turned down. They look like they are definitely under water with boat just idle.
I imagine this is to keep it quiet when off plane but wouldn't this be water reversion waiting to happen???.

turbom700

Guessing they have internal flappers, also solid water actually helps with revision as it doesn't allow air to be pulled back in, acts like a damper of sort.

dcb

My 35 fountain lightning came with underwater exhaust, reversion not a problem as the tubes are submerged at idle and open when on plane.

thirdchildhood

My understanding is that reversion is more likely at idle.

Griff

Turn downs will not cause reversion.

sprsptr

Well dammit turn them up!

veloc410

so the water is harder to pull up the exhaust when submerged??? . It would be a great way to quite my rig down. I have longer cam 246 at .05 lift.

veloc410

What if engine diesels