well hopefully you guys can help me once again. i have about 250 miles on my top end rebuild. i was riding saturday afternoon. i hit a bump it jarred me pretty good. as i started up the next hill i gave her some throttle and she blah blah blub i backed out and it sounded fine so i gave her some more blah blah blub bang! back fire. i pulled over and it was idleing perfect! so i shut it off and fire it back up. once again idles great. well the road is a mile ahead so i decide ill drive it to the road. i had to give it full throttle and rarely reached 20-30 mph. well i parked it at the road and picked it up with the truck and trailer. i change out the spark plugs sunday morning and it fires right up first pull. never took it off the trailer cause i was heading back home. i get home and try to fire it up and wham just about pull my arm out of my socket. the pull start recoiled back so hard it was like trying to pull start a 12 cylinder CAT motor. i try it again with very similar results. i pull the plugs and it pulls like butter. check compression. 125 psi on both cylinders give or take a few psi (cheap gauge) replace my plugs and its pulling over very very rough seems like its a clogged exhaust port/valve so i pull my VES setup and it pulls smooth again. i take the cover off one of my bellows and it looks in rough shape. so i called the dealer today and ordered two bellows. also i pulled my air box and drained my carbs, there was water in my bowls so i pulled my carbs and there is some dirt down in the bowls. ordered new gaskets to put them back together. what am i missing? anything else i should check?
edge 700 died again
- Thread starter smtt126
- Start date
oh! side not just came to my mind. not sure if its related. but the next morning when i changed the plugs i noticed my coolant reservoir was low. i pulled the cap (keep in mind motor is 12+ hours cold) psshhhh coolant came out of nowhere and went all over me. does this mean my system was pressurized still or in a vaccum? i had no visible coolant in my reservoir until i pulled the cap.
Sounds like the crankcase is full of antifreeze so it is hydolocking. When you pulled it over the compression from the cylinders pressurized the cooling system. I bet one of the o-rings on the head is tore or blown.
Is there a drain port on my crankcase? And would this cause the lack of power and backfiring too?
Ok I'll try draining when I get home from work. I just out new base gaskets and head Orings so I don't see how they would have fried already. Also does this explain my backfire and loss of power? Or am I still on the right track with my bellows, water in fuel, and spark plugs?
i have seen alot of pinched o rings on the head before which will cause coolant to leak into cylinder. which in turn cause fire to be put out. no fire = bog and not running right. what did your plugs look like after you took them out?
Plugs were black border line fouled. But it was running 100% then I just bogged it wasn't a gradual issue.
Have a look at your needles, maybe one lost an e clip and dropped down. Are the carbs still synced and opening together? Maybe a set screw on the shaft slipped and the slides aren't lifting together. I hit a creek real hard once when I was running an old 650, hit it so hard I popped the throttle cable out of one of the slides. When I rolled it over and started it, it was doing what your describing. It would start and idle fine, just crap out when you tried to rev it. Still doesn't explain the coolant issue unless maybe you didn't get all the air out of the system when you rebuilt it? Maybe when you jarred it hard you had some water in the float traps and it splashed up into the bowls and got pulled through the engine?
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I didn't get a chance I check the crankcase plugs maybe tomorrow if work is less hectic I'll let you guys know what I find
The cylinder head O-rings have to be polaris special high temperature O-rings. Polaris has some older versions that melt and let coolant into the combustion chamber, that then destroys the pistons.
You might check your front engine mounting bolt assemblies. The rubber base tears real easily, which then allows the block to twist, which then causes increased crankshaft bearing wear, that then causes engine failure.
You might check your front engine mounting bolt assemblies. The rubber base tears real easily, which then allows the block to twist, which then causes increased crankshaft bearing wear, that then causes engine failure.
The o rings I use came from a winderosa gasket kit I bought on eBay. If they look damaged I'll try and pick up a couple from t polaris dealer down the street
Hard to say if the hit was the beginning of my problems or if it was just a coincidence. After work I'll pull the crankcase drain plugs. Hopefully there is no fluid in it. If there is I'll pull my head and inspect the o rings if they check out ill pull the jugs and check the base gaskets. I'm still waiting on float bowl gaskets and bellows. Should be here tomorrow. Hopefully I can get it all out back together in time for this nice thaw were having this weekend.... Seasons coming to an end. It's 50 degrees today.
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Alright finally pulled my 8mm brass plugs. First one, clutch side had about 1/3 of an ounce of coolant/fuel mixture and the mag side had nothing in it. Where do I go from here? My bellows and carb gaskets will be in tomorrow I'm gonna put it back together but why is it so hard to pull start? And why did I backfire?
Sounds like you have a coolant leak on the pto side and the hit was a coincidence. You might have pinched an O ring when you put it together but in my experience a more common problem is the base gasket leaking at the front of the case. There isn't alot of area there at the front and it's pretty easy to have a gasket squirt out. Pull that jug and have a look, base gaskets are cheap and if the O rings aren't damaged I'd just reuse them.
Would that small amount of coolant 1/3 of a shot glass give me that much arm recoil when I'm pull starting? And backfire/bog? And ya I'll pull the jugs. Gaskets are cheap enough I'd rather be safe than sorry.
That amount wouldn't cause it to hydro lock, but there shouldn't be any coolant in there period. So somethings wrong, if there is more going through there yes it would cause a bog and backfire. If the mag side is good you probably don't need to pull that cylinder. I've had trouble with base gaskets in the past and there is a shop in Vancouver B.C. that actually makes gaskets that are thicker. You can get 0.030, 0.035 and 0.042 Sometimes the cylinder base or the case deck aren't as flat as they should be and a thicker gasket isn't as prone to squirting out and leaking.
So this leads me back to my original question. What caused my sled to backfire bog down lose power and run like crap? Could it have all been my fouled plug?