yamaslut
kill it
- Location
- Daytona Beach, Florida
Piston Carnage.... never seen this before
- Thread starter yamaslut
- Start date
yamaslut
kill it
- Location
- Daytona Beach, Florida
I guess that's why I had 3lbs of pressure in the front cylinder... 
parrdaddy
No he will not!
- Location
- always be a TEXAN!
Those look like Wisecos? I had one do that last month, which also snagged a ring, not sure of the order but that's what my piston looks like too :bs2:
yamaslut
kill it
- Location
- Daytona Beach, Florida
wow.... did it make your ski run on like and air leak??? that's what mine was doing..
how strange though... both rings are perfect. How does that happen???
how strange though... both rings are perfect. How does that happen???
parrdaddy
No he will not!
- Location
- always be a TEXAN!
Mine ended up with no compression, after it snagged the ring it left a pretty good size gap to the exh. port. No air leak type symptoms, it just wouldn't run.
yamaslut
kill it
- Location
- Daytona Beach, Florida
ok... thanks.
- Location
- knoxville,tn
ooo good job bro.
All this means is it's time to step the motor up a little
looks like a defect to me..
Ive seen alot of damaged piston and thats not real common.
Make sure you break everything down and check for frag.
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yamaslut
kill it
- Location
- Daytona Beach, Florida
yeah... I'm going through everything... replacing all gaskets, orings, pistons, rebuilding carbs and pulled stator to inspect it too... it was nice and rusty... got it cleaned up... i'm just waiting on parts now... they should be in tomorrow.
- Location
- knoxville,tn
got to love rust..Ive been running my stroker crank for a month and inspected the other day and the front cover had been leaking and the front snout of the billet crank is covered with rust...:doh:
Makes me sick(and its only been in fresh water)..
D Slicker
Durham, dont forget it
- Location
- Pottstown, PA
Wow, i guess those are those new air gap pistons.
- Location
- Virginia Beach, VA
I guess this means the starter was good & the motor just wouldn't turn over?
RoTAxGreNade
X-
- Location
- Port St. Loozer
Werd up Fugly!!!!
Is that a crack behind all that mess and if so is it all the way through to the underside?
Possible water ingestion then cranking motor before knowing you had it full of water as we all do when out in the break before getting towed in.
Could have stressed the piston/rings long ago and Mr Murphy decided it was time and ring blowby spit it out the exaust port.....
The rings use the compression gasses on the upstroke on top, behind and bottom of the ring (as the piston comes to TDC) to push them against the bore properly seal (not forgetting a properly finished AND perfectly round bore)..... With that chunk gone you just lost any hope of compression!
Keep in mind the rings do get slammed pretty violently on the top and bottoms of the grooves and with wear you get ring flutter which can trash things as you now have hot gasses where they shouldn't and washing away lubricant for the piston.
Tsk tsk tsk... I told you homies a 3 month E box/ flywheel cover inspection should be implemented in your preventative maintenance schedule!
Is that a crack behind all that mess and if so is it all the way through to the underside?
Possible water ingestion then cranking motor before knowing you had it full of water as we all do when out in the break before getting towed in.
Could have stressed the piston/rings long ago and Mr Murphy decided it was time and ring blowby spit it out the exaust port.....
The rings use the compression gasses on the upstroke on top, behind and bottom of the ring (as the piston comes to TDC) to push them against the bore properly seal (not forgetting a properly finished AND perfectly round bore)..... With that chunk gone you just lost any hope of compression!
Keep in mind the rings do get slammed pretty violently on the top and bottoms of the grooves and with wear you get ring flutter which can trash things as you now have hot gasses where they shouldn't and washing away lubricant for the piston.
Tsk tsk tsk... I told you homies a 3 month E box/ flywheel cover inspection should be implemented in your preventative maintenance schedule!
yamaslut
kill it
- Location
- Daytona Beach, Florida
Unkle Toms Preventive Maintenance Services.... nice to see you are still alive, holmes..
yamaslut
kill it
- Location
- Daytona Beach, Florida
nope, just another problem to add to the list... my ski was running w/ that part missing
yamaslut
kill it
- Location
- Daytona Beach, Florida
not even a slight scar on the ring... seems very unlikely, but...
w-nut
x2 nut
- Location
- christchurch new zealand
are they cast for forged pistons slutty. i did that to a set off cast pistons from deto from to much compression and lean . what does the top off the piston look like did you say it was running like it had an air leak , if so it might off had one and leaned out enough for detonation
SUPERTUNE
Race Gas Rules
- Location
- Clearwater Fl.
We Have a winner!
All of the above will do this to a piston ring land...I've seen this many times as a long time engine builder.
Also poor quality fuel, old fuel.
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yamaslut
kill it
- Location
- Daytona Beach, Florida
it was a cast piston and there was no sign of detonation. The tops of the pistons were nice and brown, w/ no pitting around the edges. THe plugs never read anything but normal readings too.... THe ski did "run on" a few times, but it never stopped starting up and running due to the piston issue. It would not start due to the starter issue..