Oil injection pump adjustment

[gman086]

To clarify your statement, the reason some customers are receiving their machines with the oil pumps anywhere up 3.5 turns "out of adjustment" on the low side is because Polaris is attempting to meet emissions regulations???

If that we're the case I wouldn't think they'd even bother installing calibration markings on the oil pump assembly at all..............

It would stand to reason that all of their oil pumps are manufactured to deliver the same amount of oil throughout the entire span of control arm movement, give or take an insignificant amount, and the alignment marks are their calibration for this particular application producing emissions within required EPA regulations.............

I wouldn't expect that Polaris would test the emissions on each & every machine & adjust every oil pump to achieve a desired result............or do they???

Thoughts???

Glen

The oil pumps were engineered long before recent EPA regs went into effect. The oil pumps are NOT specifically designed for the Pro; they're the same ones that Poo has been using for years! Poo is willing to take the gamble, with their lean factory settings, that the motor will last long enough to make it past the warranty period because passing EPA emissions is more critical.

Have FUN!

G MAN

 

[gmustangt]

This is how I see it, if Polaris turns up the pump at factory the emissions coming outvthe exhaust will not pass emission standards, if it dosent meet standards Polaris can't go to market and sell the sled...

So they put the scribe on it so us outside of EPA can adjust it to were it's suppose to be! Polaris puts it there so we know where it should be but they can't do it cuz of EPA.

 

[PalousePoo]

Before I adjusted my pump, I calculated a 51:1 ratio on a deep powder road ride before turkey day. The lever was on the lean side of the mark, so I turned the screw 3 turns richer. The next ride was setup snow and alot of slower boondocking, but the ratio came out to 61:1, go figure? The next ride, was in the throttle a little more and ratio was 55:1. Haven't figured the ratio on the laast ride, need to go to my shop and calculate, will post it tomorrow. Thinking of turning the screw even more. This is a 2011 pro, I put 900 mi on it last year with no pump adjustment and no problems

 

[Merlin]

The oil pumps were engineered long before recent EPA regs went into effect. The oil pumps are NOT specifically designed for the Pro; they're the same ones that Poo has been using for years! Poo is willing to take the gamble, with their lean factory settings, that the motor will last long enough to make it past the warranty period because passing EPA emissions is more critical.

Have FUN!

G MAN

The current style of oil injection pump may have been engineered long before the Pro but to say that they are not calibrated to the Pro may not be 100% correct..............

Taken from the Polaris on-line parts catalogue:

2008 800 Dragon - P/N 2520901 Asm., Pump, Oil

2009 800 Dragon - P/N 2520901 Asm., Pump, Oil

2010 800 Dragon - P/N 2520901 Asm., Pump, Oil

2011 800 Pro - P/N 1204363 Asm., Pump, Oil

2012 800 Pro - P/N 1204438 Asm., Pump, Oil


The service manuals for any of the Polaris machines I've ever owned(or worked on) have always specified that the calibration marks on the oil pump be lined up...............No mention was ever made in any of the manuals of adjusting the pump to achieve a leaner or richer setting???

I suspect that the pumps for these newer machines have been modified internally to deliver less oil hence the different P/Ns of the oil pump...............So, my point is that I highly doubt that the machines are leaving the factory with the oil pumps out of adjustment because that is what is required to have them meet emissions...........I suspect it's simply poor quality control..............

 

[bowtieboy]

subscribed.

 

[glassman]

Are the pumps cable controlled? If so would cable stretch change the rate of delivery? How much oil are you using per ride, with how many miles? Im sure this will change depending on how much of the throttle you use, just asking for an average usage.

 

[Merlin]

I for one, as a person that owns two 800 Pro's found these threads on the adjustment of the oilpump to be of concern to me. I agree that the Oil pump postion should be a priority at factory release of the sled if it's not a priority at the PDI of the sled at the dealers end. It should be be someones concern before you take delivery of a new sled. But from what I have read it seems that most of the pump arm positions are being delivered metering definately on the low side ( in the range of 55-1/60-1) whether it's to meet EPA regulations that can be debated. It's up to the consumer it seems to make his own decision about what is best for his own sled that he owns. The least that should be done is you should varify where the pump arm is set right now on your Pro!! Whether you have warranty on your sled is not the issue, it is stated clearly in the Polaris service manual where and how the Oil pump arm should be set at in relation to the pump body, that has also been covered in other threads here. If the pump arm set is out of spec and you don't want to change it then take it to your dealer and make them change it! Do it. 60 to 1 does'nt work for me!

Exactly my sentiments................

Well said!!!

 

[die hard poo]

Are the pumps cable controlled? If so would cable stretch change the rate of delivery? How much oil are you using per ride, with how many miles? Im sure this will change depending on how much of the throttle you use, just asking for an average usage.

No, the oil pumps are controlled via a mechanical linkage between the the throttle bodies and the oil pump arm. They did this to deviate from the exact situation you are describing.

The linkage is #10 on the microfiche:
http://www.polarispartshouse.com/?g...d_LINES_-_S11CG8//CH8_ALL_OPTIONS/78331/78372