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Discussion Starter · #1 ·
hello im new here and have no damn idea whats up with thise snowmoble!

my first sled and dont know whats up, symptoms are...wont idle under 3000, pulls superhard from 3k-7k then it drops power and drops rpm to around 6k and wont go passed 40-45mph.
after ride first cylinder and pipe was cold,second pipe was warm/hot, third pipe was warm/hot... i figured the first cylinder wasnt firing but idk. 1st cylinder plug is really wet and burnt looking, second looks alittle wet and middle electrode is carmel, 3rd cylinder is same as second.

i have made sure plungers for chokes are not stuck, spark is going to all 3 cylinder coils and cleaned carbs very well. ( 370-390-370) jetting for main jets pilots are like 50 i think. it has 3 slp expansion pipes, blue clutch spring, rear pulley set at number 3 and blue spring in that, also running 10-56 weights. its like whoever before me followed every step from the slp site on how to build it up from spec sheet

i do notice that when i try to start it first pull is hard as hell,2nd pull is hard as hell, 3rd pull is easy as hell and usually tries to start but takes about 3 trys in that order.
i checked reeds and all were closed didnt look bent chipped etc on any cylinders, also looked at pistons and none of them have blow by not even past the crown of piston all in good order.

some things that i seen look suspicious;

3rd cylinder manifold just above top left corner is a nipple i believe is a vac port? un covered dont know where it goes to
under the 2nd cylinder is a bolt missing from mid case on back i heard it could be a drian screw? i seen what looks like coolant behing the 3rd cylinder for the output but didnt seems to be leaking. it has 2 bolts from behind first cylinder missing also. please help me and if you have any ideas what to look for or how to fix this help!

oh and when i took first slp pipe off gas poured out from suspect cylinder?!?

if there is a badass mechanic here i can call who doesnt want to charge me or someone who knows these engines well that would be sweet...god im a mess
 

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you need to take this thing somewhere...sounds like it is missing some serious parts and if you keep running it you are going to do some/more damage.where are you located?
 

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The nipple that goes nowhere is a vent and is normally just open. If you are missing one of the drain screws then you are going to run lean (not good). Pull the drain screw on the cylinder that is not firing and see if fuel comes out, that may explain the hard pull (sounds like you may be loading up with fuel on that cylinder).

Which cylinder are you calling number one? The correct terms are mag(recoil), center and pto (clutch). If its the mag cylinder that's bad and there is fuel at the drain plug then you likely have a bad fuel pump. Remove the line from the pump to the crankcase and check for fuel in there, it should be dry.

Make sure you replace that missing drain plug, its probably down in the belly under the exhaust somewhere. It will have a metal gasket (washer) as well.
 

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Discussion Starter · #4 ·
The nipple that goes nowhere is a vent and is normally just open. If you are missing one of the drain screws then you are going to run lean (not good). Pull the drain screw on the cylinder that is not firing and see if fuel comes out, that may explain the hard pull (sounds like you may be loading up with fuel on that cylinder).

Which cylinder are you calling number one? The correct terms are mag(recoil), center and pto (clutch). If its the mag cylinder that's bad and there is fuel at the drain plug then you likely have a bad fuel pump. Remove the line from the pump to the crankcase and check for fuel in there, it should be dry.

Make sure you replace that missing drain plug, its probably down in the belly under the exhaust somewhere. It will have a metal gasket (washer) as well.
thank god someone can help me! please if you have pictures or if i ould call you if you know alot that would save time. im located in michigan also.

how do i upload pictures? from my computer to this site? im talking of the pto cylinder then. and honestly i dont know where to even know if this is a drain plug. when my fuel is off it kinda still runs out of the blue fuel lines.
 

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Discussion Starter · #6 ·
first pic you can see a bolt missing, second i seen 2 laterally next to clutch, 3rd is a mysterious switch, 4th you can see the yellow line where i blocked off the port thinking it was a pulse vent for the pump, 5th is the pipes. i really need some guidance because im new to these machi9nes but not engines at all. i can handle all the work i just need help finding whats what and if its a problem. i just want to say for you guys helping me i very greatly appreciate it! and happy holidays
 

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First off - a question. Is this an Ultra? What year? - My guess is yes and 97

None of those bolt holes are the drain plugs, they are further down on the bottom of the case, one for each cylinder. The mag drain is kind of hidden under the water pump

The holes by the clutch are where you would mount an aftermarket torque arm. I don't think the one by the water pump is used for anything.

That switch is not factory. A previous owner must have installed it for something - possibly handwarmers, kill switch, heated visor - who knows? Check where the wiring goes.

Unplug that yellow line, it is a crankcase vent and needs to be open.

Like I stated before, check the fuel pump and the needle and seat on the problem cylinder.
 

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Discussion Starter · #8 ·
1996 polaris ultra sp indy 68o triple, ive 100 percent cleaned the carbs and went through everything on it. can you get me pics of what the plugs look like? and i will unplug the vent line. its not going to lean it out? also when i rode it it will scream with power until 7k and drop to 6k and just feels loaded like loosing power. today took pipes off and pto cylinder poured gas out of it?
 

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Discussion Starter · #9 ·
i will rebuild the fuel pump tomorrow, do you have a picture of how the coils are supposed to be hooked up? it looks tampered with and the pto cylinder after 40mins of riding was cold why is that
 

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Its not firing on that cylinder. Take out the drain plug on that cylinder and see how much gas drains out. I would drain all of them, then change the plugs and see if that helps.
 

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U drove 40 min with only 2 cylinders running.??Dont worry about the holes they are for the electric start.Take all of your spark plugs out,shine a light down the holes as you turn the primary clutch by hand slowly,check the tops of each piston as they come up.Make sure there is no damage to them.Since you have the pipes off shine the light into the exhaust flanges and check the fronts of the pistons by turning clutch by hand slowly.Do that first then get back to us.
 

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Discussion Starter · #13 ·
wow! found 2/3 and gas poured out of the pto cylinder! thanks ultrajunkie for help. i will drain the other one i can see and hopefully the 3rd mag i can find. what would cause that gas to pour into the cylinder? and why would it not fire what plug would you recommend for ditch riding not much WOT runs
 

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Discussion Starter · #14 ·
theres deff more then 1 wire on all these coils previous guy must of did some wiring. i made sure i could see spark on all cylinders so they are all sparking i even grabbed cables to make sure i could feel a spark. lol yes about 40 mins. it wont idle below 2800-3000 it will just kill and when riding i can feel a low end bog forsure like leanish. i feel like its firing up to 7k and then cuts out or something.
 

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wow! found 2/3 and gas poured out of the pto cylinder! thanks ultrajunkie for help. i will drain the other one i can see and hopefully the 3rd mag i can find. what would cause that gas to pour into the cylinder? and why would it not fire what plug would you recommend for ditch riding not much WOT runs
bad needle and seat as he stated earlier.
 

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If your PTO piston is shot it will keep loading up with fuel.I will go outside and check the coil wiring for you.Did you check the pistons yet??Im afraid you have more of a problem than just draining and putting in a new plug.No disrespect Ultrajunkie.Im sure we can help him out.
 

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Discussion Starter · #17 ·
yeah whatever you think needs to be done ill try and do it. i dont think its shot i called the guy before and he said he took it to a place here in Michigan called babbits and they installed new piston and rings. i looked at all 3 and they look good. no blow by and no carbon past the crown of piston. if you could actually get a clear pic of what wires go where in the coils i will be more confident when putting it back together. how can i tell if the carb seat is bad? these have slp slides and needles i believe, clip in mid position
 

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Discussion Starter · #20 · (Edited)
thats ok i appreciate the try heres what i found,

COIL #1
RED connects to white wire with green stripe
ground wire connected to COIL #2's ground

COIL #2
RED connects to white wire with yellow stripe
ground to middle water tube bolt

COIL #3
RED connects to WHITE wire with blue stripe
ground to middle water tube bolt

then there is a solid black wire from harness to middle water tube bolt connected with the rest. should i ground the first coil to the rest or leave it ground to coil 2 ground? also whats the second pics random white/red and yellow wires hangine out? its by ignition key Auto part Fuel line Vehicle Engine Car
Auto part Fuel line Wire Engine Technology
 
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