pxctoday

» Log in

User Name:

Password:

Not a member yet?
Register Now!

» Find OEM Parts

» Jobs

» wallpapers

Page 1 of 8 123 ... LastLast
Results 1 to 10 of 72
  1. #1
    Frequent Poster Associated98's Avatar
    Join Date
    May 2014
    Location
    Cottage Grove, MN
    Posts
    235

    ts77r hole in piston

    I just bought a tsr 770 last night, and I wasn't thinking when I removed the cylinders to inspect the crank, but now I cant leak down test the motor because I'm a big dummy. I was wondering if you guys could try to help me diagnose this hole before I rebuild it. It did not come with the spark plugs so I don't know what the plugs looked like, but both pistons where scored and the pto cylinder had melted piston smeared and stuck to it. I'll post a picture of the motor in a bit. No carbs ether so cant inspect those.
    Last edited by Associated98; 08-10-2016 at 04:00 PM.
    Own:
    99' TS770R
    98' TS1000R
    97' Daytona 1000
    Owned:
    94' Montego (my first) sold
    95' Daytona sold
    95' Daytona parted out
    95' Barracuda sold
    96' Montego sold
    96' Daytona (the one that got away...) sold
    96' Monte Carlo 900 sold
    97' Daytona 1000 clean and beautiful. You will be missed.

  2. #2
    Frequent Poster Associated98's Avatar
    Join Date
    May 2014
    Location
    Cottage Grove, MN
    Posts
    235

    Re: ts77r hole in piston

    IMAG0246.jpgIMAG0251.jpgIMAG0249.jpgIMAG0247.jpgIMAG0253.jpg
    Here is the motor. Pictures are of both cylinders, both pistons, and the head. Bottom end is good, head is good, but cylinders and pistons are junk. Might be able to bore out the cylinders but I'm probably just going to do a complete sbt top end. Still need to figure out why this happened though so I don't waste my money.
    Last edited by Associated98; 08-10-2016 at 05:26 PM.
    Own:
    99' TS770R
    98' TS1000R
    97' Daytona 1000
    Owned:
    94' Montego (my first) sold
    95' Daytona sold
    95' Daytona parted out
    95' Barracuda sold
    96' Montego sold
    96' Daytona (the one that got away...) sold
    96' Monte Carlo 900 sold
    97' Daytona 1000 clean and beautiful. You will be missed.

  3. #3
    PWCToday Newbie Whossharkbait's Avatar
    Join Date
    Jul 2015
    Location
    Nebraska
    Posts
    34

    Re: ts77r hole in piston

    That's what mine looked like when my pto crank seals went bad. It sucks but I would put it back together and do a leakdown on it. Unless you are just gonna go reman. Also while it's apart go ahead and rebuild the carbs.
    99 Tsr 770: gps 59.3, kawi 1100 limited motor, dried out stock pipe, mikuni 44s, Ada head 145psi, 148 mm pump.
    94 barracuda custom: 770 limited motor, 2* static advance, vforce delta reeds, milled head 165psi, molded pump inlet grafted on with 146 mm pump.

  4. #4
    PWCToday Regular Goodchildren's Avatar
    Join Date
    Jul 2012
    Location
    Joliette, Quebec, Canada
    Age
    32
    Posts
    130

    Re: ts77r hole in piston

    why not replaced complete seal kit for sure no more problem after rebuilt
    Tigershark Daytona 640 1995
    Tigershark 644 1993

  5. #5
    I dream skis
    Join Date
    Jun 2006
    Location
    PA
    Age
    57
    Posts
    765

    Re: ts77r hole in piston

    Lean-outs are caused most times by air ingestion passed bad seals. Time to do soup-to-nuts on this one, or you'll just repeat history.

  6. #6
    PWCToday Regular PsychoSchematic's Avatar
    Join Date
    Aug 2006
    Location
    WI
    Age
    34
    Posts
    140

    Re: ts77r hole in piston

    Engine literally only has a few hours on it, suspecting large air leak somewhere, new sbt crank seals were installed this spring, along with top end kit. When you find the leak let me know where I f'd up. :smack:
    1997 TigerShark Daytona 1000: Arctic Cat green, hydroturf, Beach House sponsons, TDR exhaust, 16/21 Skat Trak Slimline impeller, 1100R steering nozzle. More to come

    1999 TSR 1100

    1994 TigerShark Barracuda: Solas Super Camber impeller, Black Magic intake grate, Rend ride plate, JRE Lightweight Flywheel, DG Tri-Oval waterbox, beach house.

  7. #7
    Frequent Poster Associated98's Avatar
    Join Date
    May 2014
    Location
    Cottage Grove, MN
    Posts
    235

    Re: ts77r hole in piston

    So general consensus is bad crank seals? I know a rebuild with new gaskets is basically mandatory in this situation, and I know it was lean condition, but I'm trying to figure out if it's crank seals, bad gaskets/crank case sealent, or dirty carbs. I do not have the carburetors for this ski so I am unable to rebuild/inspect them. I bought the ski as a project. But normally a smart technician would have done a leak down test before starting to disassemble. But I prove once again that I'm a big dummy lol. My consern is that now that the original seal between the cylinder and crank case has been broken, even if I reassemble the motor I'm not going to get an accurate result from the leak down test. It could how ever show me if the crank seals or bottom end gaskets where leaking I guess.
    Own:
    99' TS770R
    98' TS1000R
    97' Daytona 1000
    Owned:
    94' Montego (my first) sold
    95' Daytona sold
    95' Daytona parted out
    95' Barracuda sold
    96' Montego sold
    96' Daytona (the one that got away...) sold
    96' Monte Carlo 900 sold
    97' Daytona 1000 clean and beautiful. You will be missed.

  8. #8
    PWCToday Newbie Whossharkbait's Avatar
    Join Date
    Jul 2015
    Location
    Nebraska
    Posts
    34

    Re: ts77r hole in piston

    You can do a leak down but you're not looking for it to hold pressure at this point. what you're looking for is the leak, so get a bottle of soapy water and start spraying, the leak will appear. At this point because you don't have the carbs I would just do a complete gasket kit reseal the cases get some carbs and go ride it like you stole it.
    99 Tsr 770: gps 59.3, kawi 1100 limited motor, dried out stock pipe, mikuni 44s, Ada head 145psi, 148 mm pump.
    94 barracuda custom: 770 limited motor, 2* static advance, vforce delta reeds, milled head 165psi, molded pump inlet grafted on with 146 mm pump.

  9. #9
    Frequent Poster Associated98's Avatar
    Join Date
    May 2014
    Location
    Cottage Grove, MN
    Posts
    235

    Re: ts77r hole in piston

    I pulled off the mag cover to get the fly wheel off, and there was some oily stuff on the bottom, it looked like oil and was slippery like oil, but it didn't smell like oil. I can't get the damn flywheel off ether. I'm using a puller, heated up the flywheel, and pounded on the puller and still nothing.
    Own:
    99' TS770R
    98' TS1000R
    97' Daytona 1000
    Owned:
    94' Montego (my first) sold
    95' Daytona sold
    95' Daytona parted out
    95' Barracuda sold
    96' Montego sold
    96' Daytona (the one that got away...) sold
    96' Monte Carlo 900 sold
    97' Daytona 1000 clean and beautiful. You will be missed.

  10. #10

    Re: ts77r hole in piston

    ***** to pulll sometimes... use an air gun

Page 1 of 8 123 ... LastLast

Thread Information

Users Browsing this Thread

There are currently 1 users browsing this thread. (0 members and 1 guests)

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •  
Powered by vBadvanced CMPS v4.2.0