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  1. #1
    Pain is fear leaving your body.... rlovebk's Avatar
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    THAR SHE BLOWS!!! (piston)

    Well, I finally managed to join the all-inclusive Fuji blues club.
    Thing is, 3 weeks ago I had her out at the lake and the ski ran great. But I had all this junk in my fuel lines and tank. So I took the tank out and cleaned it, replaced all fuel lines, checked the carb screens.
    I did pull apart 1 carb to check, it was clean. This was the one I had trouble getting the diaphram back in. Could that be? The only other thing was I had to make my own carb base gaskets. The old ones had that white stuff motor builders use (#'s?) for good seal, and it wrecked 1 of them, so I made 3 new ones.
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  2. #2
    Pain is fear leaving your body.... rlovebk's Avatar
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    So, me and my son drove to the Sac. Delta area for the '09 freedom ride. Took 'er out, and could only get 45-4700 rpm. A coupla times after idle, it would run up to 62-6300, and go right back down.
    Seemed to be starving for fuel.
    So took her in, put on trlr, and went thru everything again. Re-set carbs to factory, plus 1/4 turn. Put it back in the am, for the ride. Got right up on plane at 6200 for 10 sec. and died.
    Bummer to as I was the only Polaris Pilot present. Pirate didn't show 'til the afternoon. He had said Al was coming, so I was going to ask the what they thought. I know Al would have found whatever it was. I just don't have the experience or the knowledge.
    So my son took the Kaw 1200 on the 90 mile ride, and when he got back, I did get to go on a 40 mile mostly wot run on the Kaw with 17 other ski's along. Fun!
    So.....
    1. How do I ensure the bottom end doesn't have cosmic piston dust in it?
    2. Best source for piston and rings?
    3. If only breaking in 1 cylinder, do I use pre-mix, etc.
    4. The jug seems in good shape, but needs a hone.

    Was trying to represent with my fine metro-sexy color and design Polaris ski, but I did get to meet some great people and take a great ride thru some interesting waterways.

  3. #3
    Lake Mead Bum & BTLS Mark starflight's Avatar
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    Robert and I were talking your troubles yesterday. I notice from the pic that the head gasket is upside down Bro. Take a look at the other pistonies, and see if they were running lean too. If they are ok, you may have an air leak. Rear seal, base gasket perhaps.

  4. #4
    Lake Mead Bum & BTLS Mark starflight's Avatar
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    If they are all lean, I'd suspect the tank venting. Perhaps the intake check/vent stuck closed? Or the fuel cock restricting, or leaking/ sucking air?

  5. #5
    Click avatar for tech links/info, donation request K447's Avatar
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    Quote Originally Posted by rlovebk View Post
    ...3. If only breaking in 1 cylinder, do I use pre-mix, etc. ...
    Breaking in one or more cylinders is all the same.

    Pre-mix, warm-up, partial throttle and heat/cool cycles, just the same whether it is just one cylinder, or all of them.

  6. #6
    Pain is fear leaving your body.... rlovebk's Avatar
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    I checked the fuel valve, it is okay. I dont think tank venting has anything to do with it because it is the same set up it was. The tank on a 94 doesn't pressurize. I will upgrade to the 95 set up as soon as I find a check valve that has 1/4 barb on both sides so I can vent to the pisser port by the bars, and will use an in vent from a t on the out vent.

    Would the bad carb diaphram do it?
    How hard is the rear seal to deal with?
    Any sugs. on my previous questions?
    Man, what a bummer. Was really looking forward to that ride.

  7. #7
    Pain is fear leaving your body.... rlovebk's Avatar
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    Thx XLint. Duration?

  8. #8
    Pain is fear leaving your body.... rlovebk's Avatar
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    Eric, upside down as in holes are in right place, just upside down or...?

  9. #9
    Click avatar for tech links/info, donation request K447's Avatar
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    Quote Originally Posted by rlovebk View Post
    ...The tank on a 94 doesn't pressurize.
    It doesn't?

    I will upgrade to the 95 set up as soon as I find a check valve that has 1/4 barb on both sides so I can vent to the pisser port by the bars, and will use an in vent from a t on the out vent...
    Find or make an adapter hose barb between the two hose sizes you need, and then use the stock 1995 Polaris check valves.

    You could also create another hole in the same place the 1995 models have it, and install a stock 1995 tank vent fitting.

  10. #10
    Pain is fear leaving your body.... rlovebk's Avatar
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    The vent on my ski looks like a Kawasaki pisser thing up by the bars. It has a two way check valve. It allows air in or out and has a thing on it for turn - over, so no gas gets to the engine comp.
    It has never pressured up. I also need a new fuel cap gasket, the one from the supply lines. (blue) The old one was shot. I put a cork one in for just the weekend from a John Deere tractor fuel seperator. Fit great and sealed, but its cork. Figured I could get away with it for the weekend. Should I make one out of innertube? No one has rubber gasket material any more.

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