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Challenger 1800 1998 cavitation
- Thread starter Bryan1102
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I guess that's next one of the impellers has a small ding don't remember wich one will check
Albysure
New Member
Ding should be fine unless it got bent....check your carbon seal out...put the boat in water and see if that side leaks at all...pull the guard off and look but don't touch while its running.....does it take off fine after you finally plane out? ....if so your pulling air through your carbon seal...
+1. Everything I have read and experienced leads me to believe your carbon ring isn't sealing. I changed mine out last year, it's easy and you'll see a huge difference. I did the carbon ring, stainless ring, o-rings, accordion boot, etc, on both sides. Added neoprene seals at the pumps, and no more cavitation. Also switched to skat-trak swirls and new wear rings. The previous owner had just put in new wear rings but the cavitation remained. I ordered the seals as a kit, just can't remember from where.
As a side note, the dealer inspected the carbon rings, said they were fine, but "resurfaced" them anyway. Didn't work. Apparently a bad one looks fine, a visual check won't always reveal a bad seal.
Guest_User
New Member
the challenger is a heavy azz boat for 140mm pumps, so it all has to be good. wear ring clearance, impellers, carbon seals and floating ring, and most important the proper amount of tension on the bellows...
a good "looking" carbon ring can still leak if it doesnt have the correct tension on it... they are meant to dribble, but will suck air like a pig.
look at the wear pattern on the carbon ring to determine whats going on, if any pattern is offset and not even all the way around there is probably an alignment issue to...
I`ve never known anyone to resurface a carbon seal....
a good "looking" carbon ring can still leak if it doesnt have the correct tension on it... they are meant to dribble, but will suck air like a pig.
look at the wear pattern on the carbon ring to determine whats going on, if any pattern is offset and not even all the way around there is probably an alignment issue to...
I`ve never known anyone to resurface a carbon seal....
Guest_User
New Member
They rubbed them on an Emory board. They did quite a few things that boggled my mind.[/QUOTE]
hahahaha are they crazy! how does that resurface the face of the carbon seal? that surface is polished like glass...
wow... I`d be more concerned with burn marks in the face of the sealing ring causing leakage...
Before you go all hog wild ripping stuff apart, get the grease gun out and pump the zerk fitting on the PTO and see if the shaft moves backwards. These boats will cavitate when that tension is low like Pale Rider said. Easiest fix to "lets see if this is it" is the grease gun.
Guest_User
New Member
hahahaha, hey Dan! I actually have a dedicated grease gun with that million dollar SeaDoo synthetic grease just for the dam PTO zerk! :lols:
what`s up buddy!:cheers:
Well really haven't had a chance to do anything but I do remember that at least the bellows on both sides look brand new I'm very shorth on time and juts trying to gather some theories so we can figure it out . This thing was not on the water for at least 1 1/2 years previous owner said it worked fine but needed some work , keep the ideas coming will let you know what fixes it
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