That was my thinking when I worked on my risers this week-end - during engine operation, I assume that there is water entering the exhaust process just above the seal between the manifold and riser. The force of the exhaust gases obviously takes care of the water assisting in the exhaust process. The plates won't stop reversion, if that's gonna happen. W/r/t condensation, I saw no evidence of rust or water on the retriction plate itself after two years of operation. Noticed another boater of hotboat reporting 3 mph gain from this past week-end.

Snap some pics while your at it.

Warranty expired 2 weeks ago...Game on!

Okay, so unbolt the riser; remove this plate-a-ma-jiggy looking thing; reuse one of the two gaskets after carefully removing; re-install riser; go play. Am I missing something?

I like the polished riser idea as well. I think I read your post and saw pics of that. Think i'm gonna do the same thing as soon as I find a local polish guy...

You aint gonna be able to reuse the gaskets no matter how carefull you are.

I removed them two weeks ago and used two new gaskets, but could have re-used all four, they were like brand new,, about a half hour job..

chris288 have you water tested since removing ?

Will do. I'm waiting on my props from Houston Prop and hope to get them back this week. I might try to make some baseline runs Saturday morning then remove them and run some more. This will give me a good comparison with similar water and temp conditions. I have the gaskets ordered from Bam so hopefully they will be here in time too.

Tony,, I really should have tested first then changed them at the ramp and re-tested,,, but from what I can tell I did get a consistent 1 mph more,, with 3 people and full tank of gas I was hitting 70,, usually only get around 68-69... Anyway,, I didn't like how the motor was running,, I'm thinking of putting them back in,, it was acting wierd, felt really slow one minute and then felt like a rocket,, like I said weird,, I topped the boat off with 70 gallons plus whatever I had in it at the end of last year,, so I don't know if it was the old gas or what,, it was stabalized,, but I really didn't like how the boat was acting..

Okay, new gaskets....

I don't know how opening up the exhaust route a little could affect how a motor runs in a negative fashion Chris. After all isn't that how a set of after market headers work? I would suspect something else if it continues like as you said, fuel or a clogged fuel filter, etc.

Besides, to try couldn't hurt since it's so simple a task and it's done for the Raylar install. Highmark it'll be interesting to your comparison's, and just may be the deciding factor...

doing mine fri nite, will let you know what happens.