Mach z

One of the nice things about synthetic oils is its nature to produce cleaner exhaust and will over a peroid of time start to clean the piston tops, cylinder heads, exhaust ports - so don't be to much of a hurry to put a finger on Klotz.
A Sea-Doo service tech once told me that the Sea-Doo's will carbon up running the Rotax oils, that they use Johnson outboard engine tuner, spray it in the carbs and on top of the piston tops and let sit overnite, pull the plugs out,turn over the engine several times, reinstalled the plugs, start the engine up a let idle for up to 30 minutes (don't do this time all at once, break it up) keep the rpm's under 5500 for the first 30 minutes and all the carbon deposits are gone - it works I tried it - just take it easy for the first 30 minutes, so you don't scuff the pistons. be aware that there will be a cloud of smoke both at a idle and on the trail until all the engine tuner is burnt out !!!

I have tried the split fire spark plugs and that is truely a waste of money, they are no better than the OEM plugs (NGK) in no way shape or form.
If you were leaking coolant ! you be able to see droplets on the plugs and the piston top would get washed.
Look at your piston tops - look to see if the top has color all the way around the piston top (you may have a couple areas by the transfer ports that are clean though) look at your plugs are they carbon up, wet, dirty - whats the story ?
if you feel you have a coolant leaking problem, doubtful take it in and have a leak down test - that will tell you more about your engine than just about any or method.
But once again synthetics do clean the engine while running.
But if you feel unsure go to your dealer and have them look it over it cost less than a new engine !!!

I don't believe I have a coolant leak, I don't smell it and the overflow hasn't dropped.
Here's what I observed,  I normaly ride between 0 and 1,500' and AVG. temp is 30 deg.  My Main jets are 310's across the board.  Which is what is recommended for my area.  We finally got snow so I took it out to do some testing, it ran fine only did about 20 miles because there wasn't enough snow.  Went further north the following weekend and it ran good most of the day until the end it was getting that fouled sound then it was running on 2 cyl.  The far right cylinder had fouled so I pulled the plug it was soaking wet because it wasn't firing and I ran it a bit more to see if I could clear it up.  IT was also completely black with soot.  So I replaced it, the others were sooted but not fouled. All plugs were new before the testing weekend.  I ran for another hour before the left cylinder fouled. It was black and wet as well.  We were done for the day so I went home.
I picked up 3 new plugs and replaced them all.  Also jetted down to 300 mains because I was riding at a higher altitude than I usually do (2,000&#39 .  Went back up the next weekend and again it rode good most of the day.  Towards the end of the day I pegged it and the center cyl. fouled out. Plug was completely black.  The left plug was completely white which concerned me but it was still firing and the right plug was black on one side and white on the other.  All were dryer and thats were I'm at.

Any suggestions or conclusions??  

Machzzzz1
I used split fires in my Arctic Cats before and they were a piece of junk, though they were not the platiums, maybe that would make a difference.
mrZzz
Man you got me! It would hurt to try some Amsoil power foam - spray it into the carbs and then into the spark plug holes and let sit over nite, pull the plugs again and turn turn the engine, block up the rear end of the sled and rotate the track at several different rpm's, look at the plugs and the piston wash - after all you never stated what the piston wash was like ! There are so many things to start looking at - check you jet needles (e-clip position, are they held out with the retaining arm, are they bent, scratched) pilot jets are they plunged (just take a little piece of dirt) Float out of adjustment, air leak (air manifold or air box) do you have a DPM ? is it unpluged from the air box, blocked or split in one of the hoses to the DPM rail.
plugs take awhile to read and thats why you also need to look at your piston wash ! Klotz burns so clean that it will scare you looking at the plugs. look at your center carb seeing its black - float, jet needle, loose main jet, dirt in the pilot jet.
I think you rule out a oil pump adjustment, coolant would leave little very little droplets on the plugs, did you do a 1/4 throttle chop, mid range chop, wot chop ?
I hope this helped you some, with out seeing it I can only tell you what I wrote out on this forum to look at, good luck let me know what you find out.