03-30-2008, 10:58 AM #1
04 RXP issues. Need helpful info.
Here's the background.
At the end of last year, I was running a stage 1 04 RXP without any problems at all.
Since then, I had the ski winterized, Riva SC wheel installed, and oil changed at the dealer. I installed Ext IC, 42# injectors, Flared J-Pipe, Gutted Waterbox, 15/20 Solas, Spark Plugs, Boost Gauge, and thru hull exhaust over the winter.
Now, I had some issues seating the J-Pipe and there was some smoke coming from it because it was not seated properly. I now have the J-Pipe all seated fine and not smoking, but when I ran the RXP on the hose to make sure everything with the J-Pipe was ok. However, when I ran it on the hose, I think I ran it too long and started to melt my carbon seal.
The engine had a some smoke coming from inside the hull and the ride plate was really hot. I believe the smoke was coming from the carbon seal, but I may be wrong.
Today. I dropped the ski in the water and ran it while on the trailer to see if the carbon seal was ok or not. At first there was a tiny bit of smoke at first start up, then it idled fine without any smoke. There was a very light leak coming from the carbon seal. You could see a little bit of water spinning off of it, but no smoke. The smoke in the beginning only lasted a short time. I took the ski out for a quick spin and everything seemed fine. I then took the ski out for a longer ride with the seat on. It seemed to run fine, but I was only runnng at about 7500-7600 RPM when I was at 8050-8100 at the end of last year. I took the ski back, put it on the trailer, pulled the seat and there was smoke again.
Where is this smoke coming from? Carbon Seal? Or could it be the little bit of water spinning off of the carbon seal hitting the engine and causeing steam.
I am going to check the oil to see what that is up to. Maybe that is the cause of the RPM loss, but My main concern is the smoke.
The smoke didn't have any smell to it. I am baffled.
03-30-2008, 11:02 AM #2
- Join Date
- Oct 2005
Quick ? about your setup....you said you're running a Riva Stage TWO wheel right? Why are you running 42# injectors with that setup? Unless I missed something?
03-30-2008, 11:04 AM #3
03-30-2008, 11:19 AM #4
Did you check the clampd on the waterbox? Did you check the waterbox itself for pinhole leaks? is the exhaust louder? Do you have a catch can possibly steaming up the engine compartment? I doubt you melted the carbon seal if the boat didn't sink during the ride. was it sprayed with a lube during winterizing? that would heat up and smoke after start up.
Just tossing ideas out there..
03-30-2008, 11:26 AM #5
Did you check the clampd on the waterbox? Clamps are good on the WB.
Did you check the waterbox itself for pinhole leaks? No. Danny Modded it and assured me he checked it.
is the exhaust louder? Yes, but not inside the hull, only from the outside.
Do you have a catch can possibly steaming up the engine compartment? I do have the catch can. Why would this steam?
I doubt you melted the carbon seal if the boat didn't sink during the ride. I like the sound of that.
was it sprayed with a lube during winterizing? Yes.
that would heat up and smoke after start up. But how much would it smoke.
Just tossing ideas out there.. Thanks for trying to help.
03-30-2008, 12:07 PM #6
- Join Date
- Dec 2006
- Crest Hill, IL
Define the smoke...Is it a light mist, like a quick POOF?...or is it a trail from something? Is it heavy like a cigarette? is it coming from the same spot? if somethign is burning, there should be a slight odor depending on how heavy the smoke is...It could also be vapor mist from the water hitting the hot exhaust pipe...
If you are down 500rpm, check the oil level first. If the CR was leaking, you'd be cavitating....
03-30-2008, 12:14 PM #7
Define the smoke...Is it a light mist, like a quick POOF?...or is it a trail from something? Is it heavy like a cigarette?
Cannot pin point where the smoke is coming from. It isn't whispy like from a cigarette. More like a Fog eminating from the engine compartment.
If you are down 500rpm, check the oil level first. If the CR was leaking, you'd be cavitating....No Cavitating. Ski was very responsive.
DOUG - DrewNJ. Help me out here. Maybe you can describe the smoke better. Doug was out with me today.
03-30-2008, 12:43 PM #8
my money is on the waterbox exhaust setup. Pull it apart and put it back together is what i would do.
or you could buy a bottle of gas leak fluid from home depot natural gas line parts area..you soak the joints and look for bubbles at startup.
03-30-2008, 01:16 PM #9
03-30-2008, 04:26 PM #10
- Join Date
- Oct 2005
it`s the mechanic
it sounds alot like the oil burning off the exhaust manifold if the engine was sprayed down for winterization... it will haze the interior for about an hour...
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