2019 Polaris Sportsman 850 timing
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By DonB
Had fire start in muffler due to failing fuel pump &/or fuel pressure regulator. Must I spend the $750+ for a new assembly from Arctic Cat?!? Here's what I've tried so far.
Replaced fuel pump & regulator - both from Quantum. PSI is 60 rather than the 42 the dealer advises it should be, so problem persists. I've now twice replaced the Quantum regulator & discussed w/ Quantum. They advise that they don't have an alternative regulator that would bring PSI down to 42. I've tried several in-line, adjustable pressure regulators but they either didn't work or I couldn't get a constant pressure from them. FYI, I've only tried the adjustable regulators for Fuel Injected engines however, it seems that they require vacuum to function properly. When I can temporarily get the PSI right, everything works great. Anyone else ever dealt with this problem, and, if so how did you fix it? Perhaps I should adapt the fuel system to include a gas tank return line?
Any insights are greatly appreciated, Don
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By Joeguy
I been working on this thing for like 2 months now and it will not run right, is very smokey, and has a pretty loud tap that i think is in the bottom end. Not sure how much the parts are but i will put the time into it if they are pretty cheap. Im not very experienced but going off how the plug looks and the oil on top of the piston i am getting a whole lot of oil coming in from somewhere, not sure if it can come from the valves or if the rings are just shot, my cheap scope cant really see the walls of the cylinder too well.
20241009_123850.mp4 -
By n4cer26
Hi guys!
I recently acquired a 2004 Sportsman 600 4x4. It originally ran great but now It runs very rough and only with choke on. It dies when you hit the throttle. I will be removing the carb for a good cleaning. At this point I'm thinking it's a fuel issue. I replaced the fuel pump and fuel filter today as they are cheap. When I get the carb back we will see how it goes. If it still runs bad I might try bypassing the fuel pump and running direct from tank to carb. Any ideas as to what I should be trying would be greatly appreciated.
Also, the carb has two nipples in the front in the front on each side. The left side has a vent hose on it but the right side is capped off. Shouldn't this one be venting as well? See pic.
I did pick up a new aftermarket carb to have just in case. There is a hose fitting on the right rear that my OEM carb doesn't have. What would this be for? I would think just keep that on capped? (See pic)
Thanksnin advance.
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By Ulfthednar
Got others in the works.
Been years since I really played with editing software and content creation. ATV+Gopro+Davinci.
https://youtu.be/-JV-xEq9uW8
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By RRP
My new 2023 Polaris Sportsman 850 is in the shop for a pinched Wiring Harness from the factory...
I did one ride on it (100kms), then to the shop for a month, waiting for them to replace it with a new one.
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