jeff32

So, those million dollars brand new boat are also fighting against reversion... Sad reality then...

HyFive578

I have never used the silent choice, EVER... The reversion is not from using the Silent Choice, it's the actual setup that is the problem. Because there is a hole in the bottom of the tail for the water / exhaust to flow down the Z-pipe that connects to the Y-pipe, the water dump is too far forward and the water is entering the exhaust stream too close to the collector. At idle, the engines are on the verge of reverting and with the water that close it makes it a lot easier.. Again, the use of Silent Choice is NOT the problem, it's the exhaust configuration that is causing it. I am having dry tails made that eliminate the silent choice and put the water dump 2" from the tip of the exhaust. This is going to move the water dump at least 12-15" further back and far away from the collector on the header..

ezstriper

Exactly....had the same issue trying to get a 02 to live, just depends on how the exhaust is made and where the water is dumped in...In my silent choice lightnings the water is dumped way to far upstream because of them being silent choice...

HyFive578

Update: I did a leakdown test on both back motors and got pretty bad results; 70-80% leak down on two cylinders on the starboard motor and 25% leakdown on the port motor, which is a new long block with 18 hours on it. Cylinders 3 & 4 on both engines are the ones affected; those are the shortest runners on the headers. So what started as a valve spring and rocker arm replacement project has turned into that plus pulling both motors, valve jobs on 4 cylinder heads and brand new exhaust.

jeff32

Really ? As almost bullet proof motors, it is sad to hear. Sometimes i think black motors are much more reliable with those stock manifold and risers, less powerfull package of course but they last forever..

Good luck and keep posting your progress!

ivanfuego

Thinking about doing this too. I believe my silent choice is seized and I don't want to buy new ones plus I don't plan on ever using it.

Is this the part for that: http://www.boats.net/parts/detail/me...1776A%202.html

Bawana

Who is making your new tail??

Flightplan

Yep. Seen it done. Lowes or Home Depot.

http://www.fernco.com/plumbing/resid...bing/qwik-caps


Never mind... Sorry about the motors.

Jonesyfxr

What kind of diverters do you currently have?

HyFive578

I bought the block off plate from Teague...

http://teaguecustommarine.com/em0011...off-plate.html

It's cheaper and it's a really nice thick piece of stainless steel.. You should also replace the Y-Pipe seal and coat the entire mating surface with a heavy duty silicone.