EXHAUST?

anyone know how big the exhaust port is at the rear of the transom? is it 4 or 5 inch? I have a buddy that does exhaust work, im thinking of taking and running dual pipes off the risers all the way back and then going into a larger "y" single out. it would have to sound better but dont know if it would hurt performance.

86BFN,

I've looked at that link several times but there's no picture of the rudder arm and steering box mod.
Unless I'm brain dead and missed it which could be true.

not that im aware of, but ive only owned it about a year. but she runs STRONG and starts right up everytime. maybe i'll just go with a y pipe into a large single steel exhaust

no its not that part, its the rubber pipe that goes out of the rear of the boat that has the flap attached

Well i got down with a flashlight yesterday afternoon, and began looking. When i looked up in the exhaust tubefrom the rear of the boat, it looks like there is like maybe a baffle layer inside the tube. It looks like there are maybe hundreds of 1/2 to 1 inch bubles all in the pipe. Is this some type of sound dampner?

Hey Tim,

I want to put duel's on my '95. If you could take a pic of the rudder arm mod for me I would appreciate it immensely.
Thanks

WOW I ACTUALLY HAVE SOMETHING THAT MIGHT BE KINDA RARE!!!!!

Nate, thats a Sport Nautique. It didnt officially make the brochure until '90, but there are a handful of '89's around.

OH im not sure how to change my avatar yet but heres a pic of my baby girl

k9spd403, this was posted on PlanetNautique just recently

inboard60 wrote: Put a 92 ski in one year that i just bought and the prev owner did not tell me that he had not replaced the impeller. Took it out and it got hot fast. We did paddle it back as the rear exhaust hoses melted and it destroyed the inside of the muffler. As far as i could tell no damage to the engine at all. An old boat mechanic told me you really have to heat one (Block) up to damage it. Don't remember the temp it got to but it was hot. We just replaced the hoses and "gutted out" the inside of the muffler and also did a bit of fiberglass repair on the muff. It actually improved the sound and gave it a little more rumble. . . .like an nautique ought to sound like. Good luck with the new kid!!!!

Thanks for the comments on the exhaust, guys. Definitely not a project for the faint of heart, but it gets the job done in the looks department. Doesnt sound bad either- though it is a bit loud for a ski boat.

86BFN, tell me about that crossover pipe (H-pipe). Was that installed on your Dyne from the factory? If you did it yourself, Im curious if it made a performance improvement. I am planning to add one to my '90 this year, as well as a set of small mufflers so my ears dont ring after I ski.

eric lavine wrote: Steve, you need to snap a pic of that hydro exhaust with the crossover pipe, I think the pipe is beneficial if you are going to modify your exhasut, its one of those they wouldnt of spent the extra money at the factory unless there was some type of performance gain. BTW, hydro's are the only ones that ive seen that do that, unless it has somethiong to do with that bowtie in there lol

Eric here's a few shots of the crossover on the Dyne you asked about.



BTW have you ever encountered a nylon shaft seal such as this. I'm thinking of installing an OJ dripless while I'm replaceing the strut bushing.

Wow looks awsome and i bet it sounds that way too, but im afraid thats WAAAAAAY outside my abilities to do.

My case is exactly the opposite, I'm building this 22 feet cabin boat with a 351 Commander and I want it to be as quiet as it can, any ideas?

Sonny and Cher combo