I can't seem to find a straight answer on what the fuel pressure should be on a 2016 Sportsman 850. I've seen 39psi and 58psi. My bike is back firing through the intake which tells me I'm running lean my psi reads between 35 and 38 psi.
Sportsman_850
Ok so I've ordered the parts I need and I started trying to remove the old one. Do I have to drop the gas tank to do it? There is a frame rail that is directly above it.
You need to remove enough of the front plastics to slide the tank to the right side to clear the frame bracket.
There are a lot of YouTube videos on how to do it
There are a lot of YouTube videos on how to do it
FPD218 Cannot tell you how much I appreciate you helping me. Going out to try it now. I'll prob have more questions along the way. LoL
There are 2 bolts on the top of the fuel tank holding it in, the outside one on the right side is easy to access, the one farther in is a b!tch to get to, I know some that don't put it back in but its really needed for support when the tank is full.
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Bolt #12 is the tough one to access.
Bolt #12 is the tough one to access.
Ok so I have the old one out and waiting on the parts. Man they do not make it easy do they? My knuckles haven't been tore up like this in years.
I just finished putting in new pump tonight..everything FPD218 told you was spot on...His advice made mine a whole lot easier than if I tried to go it solo.... That left tank mount screw SUCKS! I lined up the hole, shoved the 10mm bolt in there, held it in place with one of those magnets that extend, and turned it in with a 10mm open end until I could get the ratchet wrench on it..it was an 1/8 of a turn each time...took forever...
So I got my parts in at 6 tonight by 9 it was fired up and running sweet. Just have to put her all back together tomorrow. Took apart a lot trying to figure out was was wrong with her. LoL
8 MONTHS... 8 G-D DAMN MONTHS... thats how long the fuel pump lasted! Was at Nemadji on Thursday and right in the middle of the ride.. pump failure! Or at least I think it is... acted the exact way when the original went out! I was driving on the trail (Very, very dusty and Seregenti hot temps when it went) Towed it back to camp. Going to put fuel pressure gauge on it tomorrow. If its not fuel pump, what could it be? I already replaced a perfectly good voltage regulator before finding out it was the fuel pump.
In other words you are using the cheapest and highest alcohol content gasoline you can possibly get - alcohol (ethanol) is highly corrosive, is hygroscopic (seeks water and draws it from the atmosphere), it only has to absorb point 4% of water to become heavier than the gas and separate to the bottom of the fuel tank where the alcohol is concentrated and does it's damage. I presume you bought the cheapest Amazon fuel pump you could find also?
Alcohol blended fuel separates in as little as 3 weeks - if you use alcohol fuel, don't put more in the tank than you can use in 7 days.
Alcohol blended fuel separates in as little as 3 weeks - if you use alcohol fuel, don't put more in the tank than you can use in 7 days.
I bought the pump from a place called Fuel Pump Factory. Its suppose to have a one year warranty. I contacted the company (through email) so we'll see if they stand behind their product. Latebird, everything you explained went right over my head. Are you saying I should use only non-oxy or quality 87 octane pump gas. Non Oxy isnt always an option. (Like last weekend).
I have a 21 polaris sportsman 850 highlifter had some low pressure issues after riding one day. Psi at fuel rail is 40 while running but when you give it gas it drops to like 30psi. Backfiring through intake and exhaust when letting off gas now power. Ordered fuel pump will update after
Hi all
I realise this is an old thread. But I'm pretty sure the fuel pump is the issue on my 2016 850 touring. Above, @FPD218 mentioned there being videos about changing the pump on this model. But I haven't been able to find any. If someone would be able to point me toward a resource on how to do this I would be grateful. I'm new to ATVs, but I'm a big believer is learning to do things myself.
I understand how to change the pump from videos of 570's, what I'm not clear about is how to get to the point where I can move the tank to the side so I can actually get the pump out
I realise this is an old thread. But I'm pretty sure the fuel pump is the issue on my 2016 850 touring. Above, @FPD218 mentioned there being videos about changing the pump on this model. But I haven't been able to find any. If someone would be able to point me toward a resource on how to do this I would be grateful. I'm new to ATVs, but I'm a big believer is learning to do things myself.
I understand how to change the pump from videos of 570's, what I'm not clear about is how to get to the point where I can move the tank to the side so I can actually get the pump out
@lateburd thanks for that!
I haven't had time to work on it because I've been away for work. But the problem seems to have fixed itself for now. I started it the other day and it ran fine. Too it for about an hour ride and no problems at all. So either the pump has an intermitent problem, or it is something else.
This is a machine I got from my wife's uncle. It has been sitting for almost a year because he has been sick and wasn't able to use it. When I got it, it has about 1/4 tank of gas in it. Here in Quebec we no longer have access to enthanol free fuel. So I'm thinking that the fact that it was sitting for a year, with 1/4 tank of ethanol fuel in it could possibly be the problem.
I definitely should have drained out the old fuel and replaced with fresh before starting it up the first time. But I didn't. When I has having issues with it I did fill it with fresh fuel (with an ethanol treatment). The other day I was letting it idle while I winched it back onto the trailer. Winch cable was messed up so it took me a while. Eventually I notticed it was idleing a lot smoother. Tried giving it some throttle and it revved fine. Took it for a ride around the block and all was good. Haven't had a problem since.
So my hypothesis is that adding 15L of good fuel dilluted out the bad stuff. It took a few minuted for the good fuel to work its way through the system, and that allowed it to run better. Does that make sense? I'm at a pretty basic level of understanding when it comes to combustion engines.
Other option is that it is an intermitent problem with the pump which means that it could come back at any moment.
For the moment I will be keeping my rides close to home, just in case
I haven't had time to work on it because I've been away for work. But the problem seems to have fixed itself for now. I started it the other day and it ran fine. Too it for about an hour ride and no problems at all. So either the pump has an intermitent problem, or it is something else.
This is a machine I got from my wife's uncle. It has been sitting for almost a year because he has been sick and wasn't able to use it. When I got it, it has about 1/4 tank of gas in it. Here in Quebec we no longer have access to enthanol free fuel. So I'm thinking that the fact that it was sitting for a year, with 1/4 tank of ethanol fuel in it could possibly be the problem.
I definitely should have drained out the old fuel and replaced with fresh before starting it up the first time. But I didn't. When I has having issues with it I did fill it with fresh fuel (with an ethanol treatment). The other day I was letting it idle while I winched it back onto the trailer. Winch cable was messed up so it took me a while. Eventually I notticed it was idleing a lot smoother. Tried giving it some throttle and it revved fine. Took it for a ride around the block and all was good. Haven't had a problem since.
So my hypothesis is that adding 15L of good fuel dilluted out the bad stuff. It took a few minuted for the good fuel to work its way through the system, and that allowed it to run better. Does that make sense? I'm at a pretty basic level of understanding when it comes to combustion engines.
Other option is that it is an intermitent problem with the pump which means that it could come back at any moment.
For the moment I will be keeping my rides close to home, just in case
Gasoline contains detergents and solvents that will clean as it passes through the system. If not gummed up too badly, the fresh fuel may clean the system while running. Are you sure you cannot get ethanol free fuel? The ethanol is mixed with the gas at the depot when the transport tanker is being filled. In the US ethanol fuel is banned from use on fresh water lakes and for use in commercial aircraft. Marinas that sell fuel sell only ethanol free. Also, farm equipment is exempt from using ethanol fuel because the damage to the fuel system is too expensive to repair on farm equipment. I buy ethanol free fuel from FS (a local farm service supplier) and store it in a 300 gal overhead tank on my property.
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