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My lakota has a new carb and just had a top end redone by a professional, but it will not start. The electric start turns it over great, there seems to be compression. It seems like its trying to start, getting right there and just doesnt catch. It does start occasionally, but wont run for more than a couple of minutes and smells rich. Im assuming the carb needs to be tuned, but im just wondering if anyone else has any ideas before i get a chance to work on it.
By Ed Zeppeli
I picked up this quad after the previous owner couldn't get it going.
The issue is that I can't get it to fire at idle or at all.
- replaced plug. Decent blue spark. Also tested with spark tester inline.
- rebuilt the carb. PO had already bypassed vacuum lines from petcock. There's fuel at the cylinder
- Checked compression with new gauge. reads 190 psi
- cleaned all contacts I could access.
- am currently jumping with car battery. Solenoid jumpered.
- checked cam timing at TDC and adjusted valve lash
- put gas directly into cylinder to see if it will fire at least momentarily
Motor turns over well. Plug gets wet.
Motor may fire once or twice but smokes through exhaust a bit as if it's trying to fire or combusting.
This leads me to suspect timing. As mentioned I checked the flywheel mark versus cam marks. Perhaps someone has been in there before because I can't find a 'T' on the flywheel but there is a very visible paint mark which aligns with TDC position on piston. Possibly a slipped flywheel/woodruff?
Is it possible that if it had seen previous repairs, that the timing could still be off? I'm reluctant to dig into the flywheel/stator area if there's something else I could have missed but all signs point me to that area. Would a bad CDI cause spark timing to be off?
Anywhere else to diagnose incorrect spark timing?
I've scoured these forums and elsewhere but I'm posting just in case there's something I've overlooked up until now.
Thanks very much for reading!
By Brian Simmons
The battery was gone when I bought the 90 .There are 7 wires 3 red 1 white ,1 black , 1 green and 1blue . 1 red and 1 white are connected with connector like it`s suppose to go to the battery . I think it`s called an eye connector it`s round and has a hole in the center . So it can be bolted to the battery and the same with the black wire the one black 1 has a connector on it that looks like it goes to the battery . that leaves me with 2 red wires , 1 green wire and 1 blue wire !!! Can anyone help me with a diagram of how the wiring goes to the battery on my 2002 Polaris Scrambler 90 ??? Please help me with this my e-mail address is [email protected] Pl
Please help me with this . Thank you , Brian
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By Kevin Vlogs
Does anybody know how to determine which of the 2 key blanks fits my ATV. I have called several dealers, and Polaris and nobody seems to know which key fits which ATV. I thought with the ViN number they could look it up, but apparently not. I hate to spend the money at Polaris for a key blank and then pay a locksmith to cut it, but the locksmiths around me don't have the Polaris keys in stock. I find them on Amazon and places, but I can't tell which key blank is right for my ATV. Any help would be appreciated.
Something I've noticed with the AWD on/off operation. When AWD switch is in the on position and the AWD light is on (trans engaged), turning the AWD switch off kills the engine. With trans in neutral, AWD light is off, turning switch off does not kill engine. Since I don't have the operators manual yet, I'm wondering if this is normal operation?
Problem: The ATV starts and runs at idle perfectly. But as soon as I open the throttle, the engine starts to slow down until it stops. On the attached video you can hear the sound of how it works: see video below
Prehistory: there is a Polaris Sportsman 500 1998, which for about 1.5 years stood in repair, including also replacing CDI with one taken from the same ATV. Finally, the vehicles were on wheels, traveled several kilometers and overheated - forgot to fill the antifreeze Came back home in small moves. The next trip started well, but after 10 km there was a feeling of a small drop in power (even as the vehicle got warm completely) but still drives. Next trip - the situation is repeated. The next test of ATV through time and a huge loss of power from the very beginning. The engine sneezes, does not want to go more than 5 mph.
What has been done: the carburetor has been replaced with a new one (inexpensive, $ 40), a new spark plug, a new ignition coil, the engine head has been removed, the piston is in good condition, valves were corrected - but the problem was definitely not in them.
Ignition control unit is suspected. Who faced similar? Please help in solving the problem.
Thanks in advance.
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